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Dessert

Peanut Filling for Cake

A sweet peanut filling made by boiling sugar and water, adding beaten egg white, and mixing in chopped peanuts.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Sugar and egg are a kitchen classic. They rank in the top 21% of all ingredient pairs, and cooks put them together in 122,807 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Peanut Filling for Cake

Ingredients

Directions

Make the icing

  1. Combine granulated sugar and cold water in a saucepan to make a boiled icing.

  2. Boil the mixture until it threads from a spoon.

  3. Remove from heat.

  4. Add the well-beaten egg white.

  5. Beat until thick.

Finish the filling

  1. Stir in the finely chopped peanuts.

  2. Spread the filling between cake layers and over the top.

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

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

  2. Sugar + peanuttop 27% of all pairs
    Smell alikelow
    Cooked together2,545 recipes

    Shared aroma: guaiacol (smoky, sweet).

  3. Egg + peanuttop 29% of all pairs
    Smell alikemoderate
    Cooked together1,351 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

Granulated sugar
Dissolves into the water and cooks to a syrup that sets into a thick, sweet icing.
Egg white
Whipped into the hot syrup, it traps air and thickens the icing into a spreadable texture.
Chopped peanuts
Add crunch and nutty flavor that contrast with the soft, smooth icing.

The step that matters

Boil until the syrup threads. The sugar must reach the right concentration to set the icing. Stopping too early leaves it runny, and cooking too long makes it stiff and hard to spread. Watching for the thread from a spoon shows when it is ready.

Swap the peanut

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

  1. Pecansfits better
  2. Almondfits better
  3. Chestnutfits better
  4. Peanutthe original

Fit is the average pairing score against sugar, egg. 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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