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 ↓
Caramel Cake
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Make the cake
Preheat the oven to 350°F (175°C).
Beat the egg yolks well, then add the sugar and beat for 15 minutes.
Add the beaten egg whites and boiling water to the mixture just before adding the flour.
Sift the flour with the baking powder and fold it into the mixture.
Pour the batter into prepared cake pans and bake until a toothpick comes out clean.
Make the filling
For the filling, combine the butter, sugar, and water in a saucepan.
Boil the mixture until it thickens to a jelly-like consistency.
Beat the filling while it cools until cold, then flavor with vanilla.
Assemble
Spread the filling between the layers of the cake.
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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + vanillatop 12% of all pairsSmell alikemoderateCooked together19,241 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + vanillatop 14% of all pairsSmell alikemoderateCooked together20,050 recipes
Shared aroma: guaiacol (smoky, sweet).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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
- Eggs
- Beaten whites and yolks trap air and add structure and lift to the batter.
- All-purpose flour
- Forms the gluten network that gives the cake its structure as it bakes.
- Baking powder
- Releases gas when heated, helping the cake rise and become light.
- Butter
- Adds fat for richness, tenderness and a smooth texture in the filling.
- Sugar
- Sweetens the cake and, when boiled, thickens the filling into a caramel-like mass.
The step that matters
Boil the filling until it thickens. Sugar syrup changes quickly as it cooks; boiling too little leaves the filling runny, while boiling too long can make it hard once cooled. Watching the texture matters more than the clock.
Swap the vanilla
How well each one fits the dish's main ingredients (sugar, egg, flour, butter):
- Raisinfits better
- Vanillathe original
- Figfits less well
- Lemonfits less well
Fit is the average pairing score against sugar, egg, flour, butter. 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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