Healthy Recipes Free of Gluten, Dairy, and Soy for Serious Eaters

Netherland Mustard Soup (Mostersoep)

Netherland Mustard Soup (Mostersoep)


This was one amazing soup. I had never heard of it until we landed in Sneek, NL. It was on the menu, and since it was made with cream, I decided my husband should get it, and I could take a taste test…dang was that hard. I could have eaten the entire bowl. 

Of course, I had to get back to the boat and figure this out using dairy-free. I wanted to use coconut cream milk but decided against that since the original didn’t have a coconut flavor at all. I choose to use almond milk, and it was fabulous. The next time I made this, I used oat milk, which gave it a bit more creaminess.  Either one works great.  

I also used my homemade Boney Chicken Broth and thought my Mustard Soup came out better than the restaurant’s soup, where I discovered this dish. The flavors and combinations are really unique, and just a twang of mustard gives it a warm, smooth ride to the belly! Make sure it’s the spicy mustard with seeds. Don’t use sweet mustard.


I decided not to use a thickener and used a large peeled, boiled, and mashed potato. If you prefer using a thickener, you can substitute the potato with 1 tablespoon of tapioca or potato starch. Mix it into the 1/2 cup of cold broth before you add the broth to the recipe.

I’ve made this using bacon and other times using pork belly. I prefer the pork belly strips. This is what was used in the original recipe I tested in the Netherlands. It’s so easy and a soup that definitely draws the attention of your guest!

Netherland Mustard Soup

March 21, 2020
: 6
: 20 min
: 20 min
: 40 min
: Easy


  • 1 pound of pork belly sliced in thin strips
  • 1 large peeled and boiled potato (1 cup) or 1 Tbsp Tapioca or potato starch
  • 1 Tbsp ghee
  • 1 large leek sliced in rings. Reserve a few rings to garnish the top of the soup.
  • 1 onion diced
  • 1 garlic clove diced
  • 2 Tbsp mustard with seeds
  • 2 cups of almond or oat milk
  • 4 cups chicken broth
  • Himalayan salt and fresh ground pepper to taste
  • Step 1 If you choose to use a fresh potato as your thickener, peel, boil, and mash it using a potato masher and set aside. If you’re using tapioca or potato starch, stir it into 1/2 cup of your cool broth until no lumps appear.
  • Step 2 In a medium-size saucepan, fry the pork belly strips until done. If you’re using organic pork, you might have to add the ghee. You’ll need about a 1/4 cup of the oil left from the pork belly to sauté the onion and leek.
  • Step 3 Once the pork belly is done, add the sliced leek, diced onion, and diced garlic. Give it a stir and keep on medium to low heat. Simmer for a minute or 2 in the pork belly fat and ghee if using.
  • Step 4 Add the almond or oat milk. Stirring continuously. Add the mustard and 3 1/2 cups of chicken broth. turn the heat up to medium-high. 
  • Step 5 Placed the cup of mashed potato or the 1/2 cup of chicken broth with the tapioca or potato starch into the saucepan and continue to stir.  Once it thickens up a bit, turn the heat down to low.
  • Step 6 Let it simmer for a few minutes, then serve it up with a few sliced leeks over the top!

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