Name: Milk Soup From the Ardennes
Ingredients: 2 tablespoons unsalted butter; 3 leeks, white parts only, rinsed well and sliced into thin rings; 1 large onion, coarsely chopped; 4 to 6 escarole leaves, coarsely chopped; 4 cups milk; 3 medium baking potatoes, peeled and cut into 1/2-inch cubes; salt and freshly ground black pepper to taste 2 tablespoons minced fresh parsley

Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓

Milk Soup From the Ardennes

Timeabout 30 minutes

Ingredients

2 tablespoons unsalted butter
3 leeks, white parts only, rinsed well and sliced into thin rings
1 large onion, coarsely chopped
4 to 6 escarole leaves, coarsely chopped
4 cups milk
3 medium baking potatoes, peeled and cut into 1/2-inch cubes
salt and freshly ground black pepper to taste 2 tablespoons minced fresh parsley

Directions

Make the soup

Melt the butter in a heavy soup pot over medium heat.
Add the leeks, onion, and escarole; cook covered until the vegetables are softened but not browned, 5 to 10 minutes.
Add the milk and the potatoes, season with salt and pepper.
Simmer covered until the potatoes are very soft and start to fall apart, about 30 minutes.

Finish and serve

Optionally serve the chunky soup as is or puree it in a blender or food processor for a more elegant presentation.
Serve hot, sprinkled with minced parsley.

Nutrition, whole recipe (rough)

463Calories

14 gProtein

20 gFat

61 gCarbs

What these numbers assume: 7 portions

Ingredient	Portion assumed	kcal
Potato	1 medium (173g) baked	161
Milk	1 cup (244ml) whole	149
Butter	1 tbsp (14g)	102
Onion	1 medium (110g)	44
Black Pepper	1 tsp ground (2.3g)	6
Parsley	1 tbsp chopped fresh (3.8g)	1
Salt	1 tsp (6g)	0

One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.

Recipe from the Recipes Wiki (Fandom).

Steps grouped into stages for easier reading; the method is the source's own.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

Pepper + parsleytop 2% of all pairs

Smell alikestrong

Cooked together34,122 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Onion + potatotop 3% of all pairs

Smell alikemoderate

Cooked together9,023 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Leek + oniontop 4% of all pairs

Smell alikestrong

Cooked together1,326 recipes

Shared aroma: ethyl butyrate (apple, fruity).
Leek + parsleytop 4% of all pairs

Smell alikestrong

Cooked together759 recipes

Shared aroma: trans-2-hexenal (green, leafy).
Potato + parsleytop 5% of all pairs

Smell alikemoderate

Cooked together2,855 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).

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

What each ingredient does

Leeks: Soften into sweet, mild flavor that forms the base of the soup.
Potatoes: Break down during simmering to thicken the soup and give it body.
Milk: Forms the creamy liquid that gives the soup its richness.
Unsalted butter: Adds fat and rich flavor while cooking the vegetables without browning them.
Onion: Adds savory aroma and sweetness as it softens in the butter.

The step that matters

Simmering the milk and potatoes. Milk can scorch or boil over on the bottom of a pot if heat is too high. Keep it covered at a gentle simmer so the potatoes soften evenly and the milk does not catch.

Swap the onion

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

Chivefits better
Carrotfits better
Shallotfits better
Onionthe original

Fit is the average pairing score against butter, leek, milk, potato, pepper, parsley. Candidates are from the same food group and used in at least 100 recipes.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

Potato Croquettes255 recipes

Potato Rolls78 recipes

Potato Chips53 recipes

Sweet Potato Croquettes53 recipes

Like knowing why a recipe works?

The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.

Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Milk Soup From the Ardennes