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Sauce

Sauce Hollandaise

A buttery sauce made with egg yolks, lemon juice, onion juice, and parsley.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,037 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓

Sauce Hollandaise

Ingredients

Directions

Make the sauce

  1. Melt the butter in a saucepan over low heat.

  2. Remove from heat and gradually whisk in the beaten egg yolks.

  3. Stir in the lemon juice, onion juice, and chopped parsley.

Serve

  1. Serve with fish croquettes.

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.

  1. Lemon + parsleytop 1% of all pairs
    Smell alikestrong
    Cooked together14,037 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

  2. Onion + parsleytop 9% of all pairs
    Smell alikemoderate
    Cooked together25,843 recipes

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

  3. Butter + oniontop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  4. Butter + parsleytop 15% of all pairs
    Smell alikemoderate
    Cooked together28,563 recipes

    Shared aroma: trans-2-hexenal (green, leafy).

  5. Butter + lemontop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

    Shared aroma: 3-hexenal (apple, fruity).

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

What each ingredient does

Butter
Adds richness and a silky mouthfeel to the emulsified sauce.
Egg yolks
Emulsify with the melted butter and thicken the sauce as they gently cook.
Lemon juice
Adds acidity that brightens the rich butter and egg flavour.

The step that matters

Whisking in the egg yolks off the heat. Egg yolks scramble if they get too hot, and the sauce can split. Removing the pan from the heat before whisking in the yolks lets them thicken gently and emulsify with the butter.

Swap the onion

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

  1. Shallotfits better
  2. Chivefits better
  3. Leekfits better
  4. Onionthe original

Fit is the average pairing score against butter, egg, lemon, 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.

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