Dutch Mustard Soup (Traditional Mosterdsoep)

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Dutch mustard soup, known as mosterdsoep, is a traditional dish from the northern Netherlands, especially popular during colder months. Creamy, savory, and gently tangy, it’s often served as a simple lunch or starter in cafés and homes alike.

This classic version is rich without being heavy and highlights the sharp, distinctive flavor of Dutch mustard. It’s comforting, unfussy, and exactly the kind of dish that reflects everyday Dutch cooking.

Why You’ll Love This Recipe

  • Classic Dutch comfort food
  • Creamy and savory with gentle heat
  • Simple ingredients
  • Perfect for cold weather
  • Great as a lunch or starter

Print Recipe
Prep Time 10 minutes
Cook Time 20 minutes
Course: Main Course, Side Dish, Soup
Ingredients Method Notes

Ingredients
  

  • Ingredients You’ll Need
  • 2 tbsp unsalted butter
  • 1 small onion finely chopped
  • 2 tbsp all-purpose flour
  • 3 cups chicken or vegetable stock
  • ¾ cup heavy cream
  • 3 tbsp Dutch mustard whole grain or sharp
  • ¼ tsp black pepper
  • Salt to taste
  • Optional garnishes:
  • Crispy bacon bits
  • Chopped chives or green onions
  • Croutons

Method
 

How to Make Dutch Mustard Soup
    Step 1: Sauté the onion
    1. Melt the butter in a saucepan over medium heat. Add the chopped onion and cook until soft and translucent.
    Step 2: Make the roux
    1. Stir in the flour and cook for 1–2 minutes, stirring constantly, without browning.
    Step 3: Add the stock
    1. Gradually whisk in the stock, stirring until smooth. Bring to a gentle simmer.
    Step 4: Add cream and mustard
    1. Stir in the cream and mustard. Simmer gently until the soup thickens slightly.
    Step 5: Season and serve
    1. Season with black pepper and salt to taste. Serve hot with optional garnishes.

    Notes

    Tips for the Best Mosterdsoep

    • Use good-quality Dutch mustard for authentic flavor
    • Add mustard gradually and taste as you go
    • Keep the heat low to prevent curdling
    • Serve immediately for the best texture

    Serving Suggestions 

    Dutch mustard soup is often served with:
    • Crusty bread or rolls

    Make-Ahead & Storage 

    This soup can be made a day ahead and reheated gently over low heat. Stir well before serving and avoid boiling.

    Travel Note 

    In the Netherlands, mustard soup is especially popular in colder regions, where it’s served as a simple, warming dish in cafés and lunchrooms. It’s the kind of food that feels quietly local — comforting and familiar.
    • A simple cheese sandwich
    • As a starter before a main course
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