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 ↓
Whipped Cream Filling
Ingredients
Directions
Prepare the whites
Keep the egg whites in a very cold place.
Break the egg whites into a large shallow dish.
Whip and flavor
Beat the egg whites thoroughly before gradually adding the powdered sugar.
For a soft icing, add 10 teaspoons of sugar and 1 teaspoon of cornstarch for each egg white.
Flavor the icing just before using, adding extra sugar if using lemon juice.
To color the icing, use cochineal, strawberry syrup, strong coffee, or strained orange juice.
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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Egg + sugartop 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
- Egg whites
- Whipped into a foam that traps air, giving the filling its light, airy structure.
- Powdered sugar
- Sweetens the icing and helps stabilize the whipped foam when added gradually.
- Cornstarch
- Helps stabilize the whipped foam so the soft icing holds its shape.
The step that matters
Adding the sugar gradually. Egg whites form a foam that traps air. Adding the sugar gradually, after the whites are beaten, helps the foam hold together and stay stable instead of collapsing or weeping.
Swap the lemon
The recipe marks lemon as optional. How well each one fits the dish's main ingredients (egg, sugar):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
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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