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Dessert

Soft White Filling for Layer Cake

A light, airy white filling made from sugar syrup, beaten egg whites, cream of tartar, and vanilla or lemon extract.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Soft White Filling for Layer Cake

Ingredients

Directions

Make the syrup

  1. Combine sugar and water in a saucepan.

  2. Simmer until the syrup threads.

Whip and assemble

  1. Beat the egg whites in a bowl until stiff peaks form.

  2. Add cream of tartar and continue beating while slowly pouring in the hot syrup.

  3. Beat until the mixture is thick and white.

  4. Flavor with vanilla or lemon extract.

  5. Spread immediately on layer cakes.

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 + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

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

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

  3. Cream + vanillatop 15% of all pairs
    Smell alikelow
    Cooked together12,301 recipes

    Shared aroma: 2-nonanone (fruity, floral).

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

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

  5. Egg + vanillatop 23% of all pairs
    Smell alikelow
    Cooked together27,347 recipes

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

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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

Granulated sugar
Dissolves into the water to form the syrup that sweetens and sets the filling.
Egg whites
Whip into a foam that gives the filling its light, airy structure.
Cream of tartar
Stabilizes the egg white foam so it holds its peaks and resists collapsing.

The step that matters

Pouring the hot syrup into the whites. The syrup must be hot and poured slowly in a thin stream while beating. This cooks the whites partly and builds a stable, glossy foam; pouring too fast or cold syrup leaves the mixture loose and prevents it from thickening.

“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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