Potato and leek soup is a traditional Irish, wintertime, comfort food. It is a thick soup made of potatoes and leeks simmered with vegetable or chicken stock, and combined with heavy cream to create a comforting meal.
Served with buttered, brown soda bread, it is a delicious warm treat on a cold winter’s day.
Table of Contents
Classic Irish or French Soup Recipe
Classic potato leek soup is often considered to be a French recipe, but the Irish have been making this soup for centuries. I consider my potato leek soup recipe to be traditional Irish fare.
Some call it leek and potato soup, while others give the potatoes precedence when naming.
I had to go with the name potato and leek soup, since I think this is one of the very best potato soup recipes there is.
Using Potatoes to Make Soup
Potatoes are wonderful vegetables for soup. Their starchy content helps to thicken the soup eliminating the need to add extra flour.
Leeks are also a favorite vegetable in Ireland. They add a subtle onion flavor to this soup, making it a satisfying meal on a cold and rainy days. And believe me, there are plenty cold, rainy days in Ireland, even in the summer.
Now you may prefer to make a plain potato soup without any leeks. I have a recipe for that one too. You’ll find my traditional Irish potato soup recipe here.
This recipe is for an Irish soup. Many credit the origins of this soup to France and not Ireland. There they create what is known as ‘vichyssoise’ which is usually served cold.
French leek and potato soup also consists of boiled and puréed leeks, onions, potatoes, cream, and chicken stock, but the big difference is in the serving temperature. The French serve their potato and leek soup chilled, unlike in Ireland where it is traditionally served steaming hot.
Cold soup just doesn’t cut it in Ireland, even in the summer. Who wants cold soup on a rainy day, and trust me, there are plenty rainy days during an Irish summer?
Irish Potato and Leek Soup Recipe
And so, let’s take a look at my Irish recipe for leek and potato soup.
This is one from my mother’s treasure trove of traditional Irish recipes.
At the end of this step-by-step photo tutorial you’ll find a printable recipe.
Ingredients for Potato and Leek Soup
Here’s a quick list of what you’ll need. Check out the recipe card at the bottom of the post where you’ll find exact quantities. You can toggle between US and Metric versions, plus you’ll also find all the nutritional information.
- leeks
- potatoes
- onion
- butter
- thyme sprigs (fresh)
- bay leaves
- vegetable stock
- heavy whipping cream
- salt (or to taste)
- white pepper
- chopped chives (to garnish – optional)
- bacon bits (to garnish – optional)
Ingredient Tips and Substitutions
I included bacon and chives in the ingredient picture above, but these are completely optional and used only for garnish. Chopped green onion are also good as a garnish.
This soup can be vegetarian when vegetable stock is used. If you prefer chicken stock to add flavor yout your potato leek soup then feel free to substitute it for the vegetable stock.
I like to use russet potatoes for this recipe, but Yukon golds will also work just fine.
This soup is thickened by the potatoes so no flour is used. It’s naturally gluten-free as a result.
Once you master this basic recipe you can experiment with vegetable additions. Celery, kale or spinach can be chopped up and cooked alongside the leeks for a more nutritional profile.
For vegan potato leek soup be sure to use a vegan vegetable stock and substitute coconut milk for the heavy whipping cream. Also remember to use a vegan butter when sweating the vegetables.
Directions for Potato and Leek Soup
Let’s start with a little tutorial on how to clean and chop leeks.
Since these vegetable grow upwards through sandy soil, leek leaves can be full of grit and dirt.
Cleaning the leeks is extremely important if you don’t want gritty soup. We could give a whole new meaning to the southern term ‘grits’ by not washing the leeks well.
Chop the top and the bottoms off the leeks.
Here is a picture of the leeks I used.
Look how much dirt was between the top two layers. The dirt usually likes in the lower dark green parts of the leeks.
Cut the leeks in half, then chop each half into semicircles about ¼ inch thick.
Fill a big bowl of cold water and toss in the leeks. Use your fingers to separate the layers of each leek slice.
Keep parting the layers with your fingers and stirring the pieces in the water. Let the leeks stand in the water for about 5 minutes. The dirt will fall to the bottom of the bowl.
To drain the leeks lift them into a colander with your fingers. Do not pour the leeks and water into the colander since the settled dirt at the bottom of the bowl will just pour right over and redirty the leeks.
Run some clean water over the leeks in the colander to get rid of any dirt that might still be lingering.
Once drained, dry the leeks with some paper towels. They should be ready for cooking by now.
Peel and dice the potatoes.
Cut the potato into evenly sized cubes, about 2-inch pieces.
Chop the onion.
Don’t worry about getting the onion too small since the soup will be puréed after cooking.
Now we’re ready to cook.
Melt the butter in the bottom of a large soup pot.
I use salted butter, but if you wish to control how much sodium is added try an unsalted butter.
I like to use butter rather than oil, since it adds nice flavor and coats the vegetables well for cooking. Butter is more authentically Irish anyway.
Add the chopped leeks and potato to the pot.
Stir well to coat the surface of the vegetables with melted butter.
Turn the heat down to low.
Toss in the onion and mix well together.
Cover the pot and allow the vegetables to cook slowly, by ‘sweating’ for 15 minutes.
Every 3 minutes remove the lid and stir the vegetables to prevent sticking.
When the vegetables are beginning to soften, add the vegetable broth.
You can use all vegetable broth, or use 2 cups of water and 2 cups of broth. Chicken stock can also be used if you are not concerned about keeping the soup totally vegetarian.
Next add a the bay leaves and thyme sprigs. I use dried bay leaves, but for thyme I prefer fresh herbs.
These will be removed at the end of cooking.
Season the soup with white pepper. Black pepper will leave little specks in the soup when it is pureed, so white works much better.
The flavor of white pepper is more traditionally Irish also. Growing up in Ireland, we always kept white pepper in our pepper shaker for the kitchen table, not the typical black pepper of America.
Add salt if desired. I forgot to add salt in my ingredient picture above. I find store bought stocks are quite salty to begin with, so I sometimes skip adding salt.
Turn up the heat to bring the soup to simmering point. Once it starts to bubble, turn the heat to low and let it cook for another 20 to 25 minutes.
A slow simmer is better than a rolling boil for making soups. My soup making tips explain the reasons for simmering soups.
Once cooked, remove the thyme sprigs and bay leaves.
Purée the soup using an immersion blender.
If you don’t have one of these the soup can be transferred in batches to a blender, then blitzed.
Return the soup to the pot once it is smooth.
In years gone by, in the days before electric kitchen gadgets, this soup would be puréed by passing it through a sieve or strainer.
Add the heavy whipping cream and stir into the soup.
I use a half cup, but if you really like creamy soup, use up to 1 cup of cream.
Serve warm garnished with chopped chives and bacon bits if desired.
Irish brown bread is a perfect accompaniment to this creamy potato soup with a delicate onion flavor.
Recipe Card for Leek and Potato Soup
Here is the printable recipe card.
Potato and Leek Soup
Ingredients
- 2 large leeks
- 1¼ pounds potatoes 3 medium
- ½ large onion
- 1 ounce butter
- 2 thyme sprigs fresh
- 2 bay leaves
- 4 cups vegetable stock
- ½ cup heavy whipping cream
- ¼ teaspoon salt to taste
- ¼ teaspoon white pepper
Instructions
- Chop the leeks. Wash them in a bowl of water, allowing the grit to fall to the bottom of the bowl. Lift the sliced leeks into a colander to drain. Rinse well and pat dry before using.
- Dice the potatoes and onion.
- Melt the butter in a large soup pot or dutch oven. Add the leeks, potatoes and onions, stirring to coat them in melted butter. Turn the heat to low. Cover the pot and allow the vegetables to 'sweat' for 15 minutes, stirring every 3 minutes to prevent burning.
- Add the vegetable broth, bay leaves, thyme sprigs, salt and pepper.
- Turn up the heat and bring to simmering point. Lower the heat and simmer for 20 to 25 minutes until vegetables are tender.
- Remove the bay leaves and thyme sprigs. Blend the soup until smooth with an immersion blender or in batches using a food processor or blender.
- Add the heavy whipping cream and stir into the soup. I use a half cup, but if you really like creamy soup, use up to 1 cup of cream.
- Serve hot in soup bowls. Garnish with bacon bits and chives if desired.
Nutrition Information is estimated based on the ingredients and cooking instructions as described in each recipe and is intended to be used for informational purposes only. Please note that nutrition details may vary based on methods of preparation, origin and freshness of ingredients used.
Wishing you all happy soup making days, especially during the fall and winter months.
You might like these other Irish inspired soups.
Thanks for following my recipes and ramblings.
Slán agus beannacht,
(Goodbye and blessings)
Irish American Mom
Here are some other recipes from Ireland you might enjoy…
What The Irish Eat For Saint Patrick’s Day
For Pinterest fans, here’s a pin friendly image you might like to add to your boards.
And if you would like to check out more of my traditional Irish cooking, here’s a link to my recipe index.
Kathleen
So glad to find your site! Our family came over to Canada from Ireland on my mother’s side in the late 1850’s. My father’s father was of Irish heritage, but was raised in England. I will enjoy trying out your recipes and reading your blogs!
Happy New Year!
Irish American Mom
Kathleen – So glad you found my site. I hope you enjoy my ramblings about Ireland and my new life in America. Do stop by whenever you get a chance. I have many more stories and recipes to share over the coming weeks, months and years.
Best wishes for 2013.
Mairead
Tom McCarthy
The potato/leek soup came out just grand. This is the recipe I will be recommending to people.
Irish American Mom
Thanks Tom. Glad to know you enjoyed this soup.
All the best,
Mairead
Stephanie
The only potato/leek soup I’ll ever make again. So very good on a cold day in VA.
Irish American Mom
Stephanie – thanks for letting me know you enjoyed this soup so much. It is a perfect cold day meal.
Mairead
Diana Church
After receiving 10″ of snow, I began to crave a bowl of this soup. It was delicious and the family loved it. My only regret is that I wasn’t able to make your brown bread to go with the soup. That is my goal for tomorrow, as we have plenty of soup remaining since I made a double batch. Thank you for sharing your recipes!
Irish American Mom
Diana – Thanks for letting me know your family approved of this recipe. Hope they enjoy the brown bread too. We had soup and brown bread tonight as well – just a perfect meal for a cold night.
All the best,
Mairead
Kate @ Kate from Scratch
Simple, beautiful, fast and full of flavor. Love this soup!
Irish American Mom
Thanks Kate – glad you liked it.
Mairéad
Melanie
This soup is fantastic! (I visited Ireland two years ago and fell in love with potato leek soup there. This takes me back…)
Irish American Mom
So happy to hear this soup brought back some tasty memories of Ireland. Happy St. Patrick’s Day.
Mairéad
Valerie Kelly
My husband and I just went to Ireland on our honeymoon and fell inlove with the food, and one of the thing we loved the most was their soup. So I was looking for an authentic soup recipe to make since we kinda got a little sick, since our floridian body weren’t use to the cold . My husband said it tasted just like the ones we had over there and it made him feel like we can have a little ireland back home with us. I had brought back some of the odlum brown bread mix which went perfectly with the soup. thank you so much for sharing. Cant wait to try some of your other recipes.
Irish American Mom
Valerie – I’m so glad to hear my recipes bring back memories of your honeymoon in Ireland. It’s good to know that Irish soup and brown bread will always be considered romantic menu items in your house. I’m happy you found my site and I hope you enjoy some more tastes of Ireland through my recipe posts.
All the best,
Mairéad
Colleen
Hello M, just returned from a lovely Westport summer vacation and really missed the foods that got me through some health issues while there and since. The most well received item was the potato leak soup and this recipe is perfect! Thank you for sharing this and I plan on making the stew as soon as fall arrives. I missed a side trip to Sligo, so I like your photo from your trip. I am always hoping to find a good Irish veg soup recipe, so if you know of one as good as your potato leak — please share!
Cheers!
Irish American Mom
Hi Colleen – I’m so happy to hear you had a lovely time on your trip to County Mayo this summer and I’m glad my soup recipe helped stir tasty memories of Ireland’s cuisine for you. I do have a recipe for a delicious cream of vegetable soup. Once the weather gets a little cooler I’ll make it and photograph the process to share with everyone in the fall.
Thanks so much for stopping by,
Mairéad
sandy griffith
Wow…thank you!! I just made this soup, fantastically yummy.
Irish American Mom
Sandy – thanks so much for letting me know this soup gets your seal of approval. So glad you enjoyed it.
Best wishes,
Mairéad
Siobhan Sheehan
Waiting on a big storm to hit NY- decided we needed a cozy dinner. This Potato & Leek Soup fit the bill ! Everyone LOVED it. I even tweeked it a bit so my dairy allergic kiddo could enjoy ( his portion had no cream). I will DEF make this again. Thank you ! Slainte !
Irish American Mom
Siobhan – I’m so glad your family enjoyed this soup and that you were able to adapt it for your little one with allergies. Best wishes and thanks for taking the time to comment with your seal of approval for this recipe.
Mairead
Therese McAllister
Cooking this soup today and the house smells great. I like your blog. My daughter is Mairead born in Boston but raised in Ireland in the 90’s back to states for high school. No one can say her name properly so I laughed when I read “about me”. She always says it rhymes with parade!
Soups ready….bye
Irish American Mom
Hope you all enjoyed this soup. So funny to hear your Mairead also tells people her name rhymes with parade. Thanks so much for stopping by.
Best wishes for 2014.
Mairead
Leslie Browning
Love the potato and leek soup. I had this soup for the first time in Washington DC. There is a place there called the ” IRISH CHANNEL PUB”. They put creme fraiche on top. Your recipe is easy and delicious. My husband said I need to do a double batch. Thank you.
Irish American Mom
Hi Leslie – A dollop of crème fraîche floating on top of this soup sounds delicious. So glad your husband gave this recipe a thumbs up.
All the best,
Mairéad
Lili Harris
I found your site a couple of days ago and have today made the Potato and Leek Soup for the first time and the Irish Brown Bread to go with it, it is so delicious we can’t stop eating it and the bread. Thank you for sharing these lovely recipes. Will make it again when the whole family is over next and will recommend this soup to everyone I know! Delicious. Many thanks.
Irish American Mom
Thanks so much, Lilli. I’m delighted your family enjoyed this little taste of Ireland, and thanks for recommending my recipes to your friends and family.
Best wishes,
Mairéad
Steph
This will be the second year of making your delicious soup! It’s actually very easy and your step by step and visual instructions are fantastic. It was a hit last year at my St. Pat’s party and gave an additional vegetarian menu item to guests. I emailed it to my sister who is at school in Limerick, Ireland…she was very jealous! Thank you.
Irish American Mom
So glad you like this soup. Have a lovely St. Patrick’s Day.
Mairead
Dolmen County Retailers
This recipe looks and sounds delicious! Of course, if you don’t have time for cooking such a fantastic soup, you can always buy Irish potato soup from http://www.DolmenCounty.com
David C
I made my first trip to Ireland 2 years ago in the winter and was able to take my wife this past year. There is nothing finer in the winter and to ease the pain on the wallet than a nice hearty soup with bread. My wife fell in love with potato and leek soup there and has been pestering me to make it. She was quite pleased with your recipe, I enjoyed it very much as well. I think it’s time to invest in an immersion blender for our household. My only question is what temperature do you have the stove top set to when adding the butter and then when “sweating” for 15 min? Mine was pretty much on low the whole time as I thought I read but wasn’t softening things too much. Overall I wanted to thank you for this recipe and it was fantastic.
Irish American Mom
David – I’m delighted to hear you and your wife enjoyed potato and leek soup in Ireland. When melting the butter I put the ring on a medium heat, and then turn it down to low to sweat the vegetables. I cook on a gas stove, so it heats up very quickly. If you are using an electric stove top you may have to use a medium heat to get the leeks to ‘sweat’. I would recommend adjusting the temperature up a little to make sure there is plenty of heat under that saucepan lid, to get the vegetables to soften. Every stovetop can be a little different.
Thanks so much for stopping by and for your lovely feedback about my recipe.
Best wishes,
Mairéad
Wendy Scannell
Fantastic! I have made Potato and Leek soup before but I needed a refresher and saw the Irish Mom recipe. I could not resist as I am of Irish heritage as well. My boys, Mickey and Colin will love this soup. I will visit your site for more tempting recipes.
Wendy S.
Irish American Mom
Wendy – I’m delighted you found my recipe and I hope your boys will be asking for seconds. Best wishes and thanks for stopping by.
Mairead
Angie
Made this soup for the second time and it tastes exactly like the Potato Leek soup I had while in Dublin two summers ago. Sadly, I was sick as a dog and couldn’t enjoy the city properly so Ireland and I definitely need a redo. Thank you so much for sharing this wonderful recipe!
Cheers,
Angie
Irish American Mom
Angie – Sorry to hear you were so ill when you visited Dublin two years ago – I hope you do get to visit my magical homeland again someday. I’m delighted to hear you enjoyed this soup – it’s lovely to get feedback from readers, especially when this soup replicates a favorite taste experienced in Ireland.
All the best, and thanks for stopping by,
Mairéad
Faith Schuck
Really want to make the potato leek soup. Had soup in Ireland.
Irish American Mom
Happy soup making, Faith. This recipe is a true taste of Ireland.
All the best,
Mairéad
Joyce M.
Can half & half be used instead of cream?
Irish American Mom
Yes Joyce – half and half will work just fine. I hope you enjoy this soup.
All the best,
Mairéad
Austin
Irish housewives with ‘barren’ cupboards had immersion blenders hanging around the house?
Irish American Mom
Good point Austin. I should have explained that the soup would have been mashed through a sieve to blend it in days gone by or else mashed with a potato masher. It would have been more textured than this version which is puréed.
Thanks for stopping by.
Mairéad
Belinda
Tried this recipe today and the whole family loved it. A true keeper! Thanks, and looking forward to more recipes!
Irish American Mom
Hi Belinda – I’m delighted to hear your family enjoyed this traditional Irish soup. Thanks so much for trying my recipes.
Best wishes,
Mairéad
Terry
Best potato and leek soup I’ve ever made. All your recipes are great.
Irish American Mom
Hi Terry – Thanks for checking out this recipe and rating it. I’m delighted you give this soup recipe such high praise.
All the best,
Mairéad
Nina
I add a cup of rolled oats (after the onions), and I use half stock/half milk. Sometimes I season with cumin too. I got this recipe from my Grandmother. Now I will try your recipe as well as the potato soup (without leek).
Irish American Mom
Hi Nina – Thanks for sharing all your tips for making potato and leek soup. It’s lovely to hear you still use your grandmother’s recipe. Thanks so much for stopping by to check out my recipe.
All the best,
Mairéad
Fiona
I usually make Irish Stew and Irish Soda bread. But this year, I will be making this lovely soup potato and leek alongside Irish Soda bread to celebrate the St. Paddy’s day.
☘☘ ☘ Happy St. Patrick’s Day to all Irish and I invoke the intercession of St. Patrick in all our needs!!! ☘ ☘ ☘
Irish American Mom
Hi Fiona – Happy Saint Patrick’s Day. Your menu sounds lovely. May Saint Patrick bless us all this year and smile down on us from Heaven.
Thanks for stopping by.
All the best,
Mairéad