Why it works: Lemon and rose are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 1,174 recipes. Both carry decanal, which smells soap, orange peel. The science ↓
White Icing
Ingredients
Directions
In a bowl, combine the egg whites, icing sugar, acetic acid, and rose extract.
Beat with a wooden spoon until the mixture maintains a thread-like appearance when drizzled from the spoon, about several minutes.
The icing is now ready to use.
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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Lemon + rosetop 13% of all pairsSmell alikelowCooked together1,174 recipes
Shared aroma: decanal (soap, orange peel).
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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).
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Sugar + rosetop 25% of all pairsSmell alikelowCooked together3,584 recipes
Shared aroma: beta-damascenone (apple, rose).
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
- Whip into a foam that gives the icing body and structure as it sets.
- Icing sugar
- Provides sweetness and bulk, thickening the egg whites into a spreadable icing.
- Acetic acid
- Adds sharp acidity that brightens the sweetness of the icing.
- Rose extract
- Adds a floral aroma to the icing.
The step that matters
Beating until thread-like. The icing needs enough beating for the sugar to dissolve fully and the mixture to thicken. Stopping early leaves it runny and slow to set, while the thread-like test shows it has reached the right consistency.
Swap the lemon
How well each one fits the dish's main ingredients (egg, sugar, rose):
- Vanillafits better
- Lemonthe original
- Raspberryfits about as well
- Raisinfits about as well
Fit is the average pairing score against egg, sugar, rose. 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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