Name: Duxelle Ou Fines-herbes Cuites
Ingredients: 2 tablespoons butter; 5 tablespoons chopped shallots; 5 tablespoons chopped onions; ½ cup chopped raw mushrooms; 2-3 tablespoons chopped parsley

Why it works: Shallot and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 3,737 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓

Duxelle Ou Fines-herbes Cuites

Ingredients

2 tablespoons butter
5 tablespoons chopped shallots
5 tablespoons chopped onions
½ cup chopped raw mushrooms
2-3 tablespoons chopped parsley

Directions

Prepare

Melt the butter in a saucepan.
Place the chopped shallots and onions in a cloth, dip the cloth in boiling water, and squeeze out all moisture from the shallots and onions.

Cook

Add the shallots and onions to the melted butter and sauté without browning.
Add an equal amount of chopped raw mushrooms and cook until they release their moisture.
Season the mixture.
Stir in the chopped parsley and cook for 2 more minutes while stirring.

Store

Transfer the mixture to a small dish and cover the dish.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

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.

Shallot + parsleytop 1% of all pairs

Smell alikestrong

Cooked together3,737 recipes

Shared aroma: 2,4-decadienal (seaweed).
Shallot + mushroomtop 4% of all pairs

Smell alikemoderate

Cooked together1,982 recipes

Shared aroma: 2,4-decadienal (seaweed).
Butter + mushroomtop 7% of all pairs

Smell alikemoderate

Cooked together12,525 recipes

Shared aroma: trans-2-decenal (waxy, orange).
Shallot + oniontop 8% of all pairs

Smell alikestrong

Cooked together2,431 recipes

Shared aroma: 2,4-decadienal (seaweed).
Onion + parsleytop 9% of all pairs

Smell alikemoderate

Cooked together25,843 recipes

Shared aroma: 2,4-decadienal (seaweed).

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

What each ingredient does

Butter: Carries the aromatics and adds richness while cooking gently without browning.
Shallots: Provide a mild, sweet aromatic base that becomes soft and concentrated when cooked.
Onions: Add sweetness and body to the base as they soften and lose moisture.
Raw mushrooms: Supply the earthy bulk of the duxelles; cooking releases their water and concentrates their flavor.

The step that matters

Squeezing out the moisture from the shallots and onions. Any water left in the chopped shallots and onions will steam the mixture instead of letting it sauté, and the excess moisture also carries into the mushrooms, so the duxelles stays wet rather than concentrated.

Swap the onion

How well each one fits the dish's main ingredients (butter, shallot, mushroom, parsley):

Chivefits better
Leekfits better
Spinachfits better
Onionthe original

Fit is the average pairing score against butter, shallot, mushroom, 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.