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Potato, Leek, and Pea Soup

"Once you make this, it becomes a family staple. Top with croutons and chopped green onion."

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Why it works: Leek and potato share more aroma than cooks usually use. They rank in the top 4% of all ingredient pairs, and 30 recipes mention both. Both carry 1-octen-3-ol, which smells mushroom, earthy. The science ↓

The recipe

8 servings
Prep15 min
Cook30 min

Ingredients

Contains: milk (auto-detected from the ingredients and method; we can miss things, so check labels)

Directions

Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.

  1. Melt the butter in a large soup pot over medium heat. Add the sliced leeks and cook, stirring, until soft, about 5 minutes.

  2. Add the sliced potatoes, the chicken broth and the dried tarragon. Bring to a boil, then reduce to a simmer and cook until the potatoes are very tender, about 15 minutes.

  3. Add the frozen peas and simmer for 3 minutes until heated through.

  4. Purée the soup until smooth with an immersion blender, or in batches in a countertop blender with the lid vented.

  5. Stir in the milk and warm gently over low heat for 3 to 5 minutes. Do not let it boil.

  6. Season with salt and black pepper to taste and serve hot.

By allrecipes. Recipe from Open Recipes.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.

  1. Leek + potatotop 4% of all pairs
    Aroma overlapstrong
    Mentioned together30 recipes

    Shared aroma: 1-octen-3-ol (mushroom, earthy).

  2. Butter + milktop 3% of all pairs
    Aroma overlapstrong
    Mentioned together81,222 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  3. Potato + chickentop 3% of all pairs
    Aroma overlapstrong
    Mentioned together2,756 recipes

    Shared aroma: (z)-4-decenal (green, must).

  4. Tarragon + peppertop 3% of all pairs
    Aroma overlapstrong
    Mentioned together1,691 recipes

    Shared aroma: estragole (anise, licorice).

  5. Potato + milktop 4% of all pairs
    Aroma overlapstrong
    Mentioned together3,611 recipes

    Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

Flavor stand-ins for the tarragon

How well each one fits the dish's main ingredients (butter, leek, potato, chicken, peas, milk, pepper):

  1. Thymebetter flavor fit
  2. Celerybetter flavor fit
  3. Garlicbetter flavor fit
  4. Tarragonthe original

Fit is the average pairing score against butter, leek, potato, chicken, peas, milk, pepper. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).