Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓
Boiled Icing
Ingredients
Directions
Dissolve sugar in water and boil until thick, almost like candy.
Pour the syrup onto the beaten egg whites while beating briskly.
Flavor with vanilla and continue to boil for three hours.
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 + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + vanillatop 23% of all pairsSmell alikelowCooked together27,347 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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
- Sweetens the icing and, once cooked into a thick syrup, gives it body and structure.
- Egg whites
- Form a foam that the hot syrup sets, giving the icing its light, airy texture.
- Vanilla
- Adds aroma that rounds out the sweetness of the sugar.
The step that matters
Pouring the syrup onto the beaten egg whites while beating briskly. Hot syrup poured in while the whites are beaten is spread through the foam quickly, so it cooks and stabilizes the whites evenly. Pouring it all at once or while not beating can cause lumps or uneven setting.
“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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