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Dessert

The Icing

A sweet orange icing made from egg yolks, orange zest, juice, and powdered sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Orange and sugar are a kitchen classic. They rank in the top 20% of all ingredient pairs, and cooks put them together in 19,212 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

The Icing

Ingredients

Directions

Make the icing

  1. Beat the egg yolks in a bowl.

  2. Add the grated orange rind and orange juice, ensuring they are not bitter.

  3. Thicken the mixture with powdered sugar to your desired consistency.

Ice the cake

  1. Spread the icing between the layers of the cake.

  2. Ice the top and sides of the cake nicely.

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. Orange + sugartop 20% of all pairs
    Smell alikelow
    Cooked together19,212 recipes

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

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

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

  3. Egg + orangetop 31% of all pairs
    Smell alikelow
    Cooked together10,696 recipes

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

Orange and sugar barely smell alike, yet cooks put them together in 19,212 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
Adds richness and body, giving the icing a smooth, creamy texture.
Grated orange rind
Supplies concentrated orange aroma and flavour from the peel's oils.
Orange juice
Adds acidity and fresh citrus flavour that balances the sweetness.
Powdered sugar
Sweetens the icing and thickens it to a spreadable consistency.

The step that matters

Keep the rind and juice from tasting bitter. Bitterness comes mainly from the white pith beneath the peel, so grate only the coloured zest. Bitter notes carry through the whole icing, and sugar cannot easily mask them.

Swap the orange

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

  1. Vanillafits better
  2. Raisinfits better
  3. Lemonfits better
  4. Orangethe original

Fit is the average pairing score against egg, sugar. 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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