Why it works: Flour and almond are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 8,673 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Angel Cake
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Sift the sugar and flour each four times before measuring.
Beat the egg whites to stiff froth.
Make the batter
Gradually add the sugar to the egg whites, stirring very gently.
Sift in the flour in the same manner and add the almond extract.
Pour the batter into an ungreased pan without lining.
Bake and cool
Bake in a moderate oven at 350°F (175°C) for 40 minutes, covering for the first 20 minutes.
When done, turn the cake upside down and place it on cups to allow air to circulate.
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.
Photo for illustrative purposes only · Contact us to use it
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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Flour + almondtop 5% of all pairsSmell alikemoderateCooked together8,673 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + creamtop 9% of all pairsSmell alikemoderateCooked together43,450 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Cream + almondtop 16% of all pairsSmell alikemoderateCooked together5,130 recipes
Shared aroma: 2-heptanol (bitter, floral).
Egg and flour barely smell alike, yet cooks put them together in 106,462 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 gives the cake its light, airy structure.
- Granulated sugar
- Sweetens the cake and helps stabilize the whipped egg white foam.
- All-purpose flour
- Provides the starch and protein that set the cake's structure as it bakes.
- Cream of tartar
- Acidifies the egg whites, stabilizing the foam so it holds more volume.
The step that matters
Gently folding in the sugar and flour. Egg white foam holds air only while intact. Vigorous stirring deflates it, which leads to a dense, flat cake, so the sugar and flour should be added gently.
“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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