Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Icing, for Twelpth or Bride Cake
Ingredients
Directions
Make the icing
In a grease-free pan, combine the sugar and egg whites.
Add the powdered blue and beat with a spatula for 10 minutes.
Squeeze in the lemon juice and continue beating until thick and transparent.
Finish the cake
Set the cake in a warm place for 5 minutes.
Spread the icing smoothly over the top and sides of the cake.
For a wedding cake, keep it plain; for a Twelfth cake, decorate with gum paste or other fancy items.
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.
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + lemontop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
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Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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
- Sugar
- Provides sweetness and, with the egg whites, forms the body of the icing.
- Egg whites
- Whip and set into a thick, glossy structure that holds the icing on the cake.
- Lemon juice
- Adds acidity that helps stabilise the beaten egg white foam and brightens the sweetness.
The step that matters
Beating until thick and transparent. Egg white foam must be beaten long enough to become thick and glossy; under-beaten icing stays runny and will not hold its shape on the cake. Acid from the lemon juice helps stabilise the foam as it thickens.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
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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