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Sauce

German Custard Sauce

A custard sauce made with egg yolks, powdered sugar, lemon rind, sherry, and salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and sherry are a kitchen classic. They rank in the top 17% of all ingredient pairs, and cooks put them together in 3,273 recipes. Both carry 1-octen-3-ol, which smells mushroom, earthy. The science ↓

German Custard Sauce

Ingredients

Directions

Make the sauce

  1. In a bowl, combine egg yolks, powdered sugar, lemon rind, sherry, and salt.

  2. Beat the mixture vigorously over low heat until it becomes a light, frothy custard.

Serve

  1. Serve as a sauce.

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 + sherrytop 17% of all pairs
    Smell alikemoderate
    Cooked together3,273 recipes

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

  2. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

  3. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  4. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Sugar + sherrytop 22% of all pairs
    Smell alikelow
    Cooked together4,141 recipes

    Shared aroma: guaiacol (smoky, sweet).

Sugar and lemon barely smell alike, yet cooks put them together in 53,532 recipes: they work on texture and structure more than aroma.

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

What each ingredient does

Egg yolks
Thicken as they heat, setting the mixture into a light, creamy custard.
Powdered sugar
Sweetens the sauce and dissolves smoothly into the yolks.
Sherry
Adds acidity and aroma that balance the richness of the yolks.
Lemon rind
Adds fragrant citrus oils that brighten the custard's flavor.

The step that matters

Beating over low heat. Egg yolks thicken when gently heated but scramble if they get too hot. Low heat with constant beating lets the custard set smoothly and stay light and frothy.

Swap the lemon

How well each one fits the dish's main ingredients (egg, sugar, sherry):

  1. Vanillafits better
  2. Figfits better
  3. Pineapplefits better
  4. Lemonthe original

Fit is the average pairing score against egg, sugar, sherry. 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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