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Dessert

Walnut Filling

A sweet walnut filling made with sugar, water, egg whites, cream, and walnuts.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Sugar and cream are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 43,450 recipes. Both carry 2,3-butanedione, which smells butter, sweet. The science ↓

Walnut Filling

Ingredients

Directions

Make the filling

  1. Boil sugar and water together until stiff when tested in cold water.

  2. Beat egg whites to a stiff froth.

  3. Slowly pour the boiling sugar over the beaten egg whites while continuing to beat until smooth and creamy.

  4. Mix thin cream with chopped walnuts.

Assemble and decorate

  1. Spread the walnut mixture between layers of cake.

  2. Spread remaining mixture on top.

  3. Press whole walnut halves into it before it dries.

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. Sugar + creamtop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

  2. Sugar + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

  3. Cream + walnuttop 21% of all pairs
    Smell alikelow
    Cooked together1,982 recipes

    Shared aroma: octanal (fat, soap).

  4. Egg + walnuttop 23% of all pairs
    Smell alikemoderate
    Cooked together6,037 recipes

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

  5. Egg + creamtop 24% of all pairs
    Smell alikelow
    Cooked together42,166 recipes

    Shared aroma: acetic acid (sour, vinegar).

Egg and cream barely smell alike, yet cooks put them together in 42,166 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 whites
Beaten into a stiff foam, they give the frosting its light, airy structure.
Granulated sugar
Cooked with water into a syrup that sweetens the filling and sets with the whites.
Thin cream
Adds moisture and softness to the walnut mixture so it spreads easily.
Chopped walnuts
Provide crunch and nutty flavour in the filling.

The step that matters

Pouring the boiling sugar into the egg whites. Pour the syrup slowly while beating constantly. Pouring too fast or stopping the beater can deflate the foam or cook the whites unevenly, leaving the filling grainy or runny instead of smooth and creamy.

Swap the walnut

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

  1. Almondfits better
  2. Pistachiofits better
  3. Chestnutfits about as well
  4. Walnutthe original

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