Why it works: Flour and raisin match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 9,075 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Neapolitan 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.
Prepare the batter
Preheat the oven to 350°F (175°C).
Cream together the powdered sugar and butter.
Add the sweet milk, corn-starch, flour, and baking powder; mix well.
Beat the egg whites until stiff peaks form, then fold them into the batter.
Layer and bake
Take one-third of the mixture and stir in the grated chocolate to form the middle layer.
Add a few raisins to the chocolate layer.
Pour the remaining batter into a greased cake pan, then add the chocolate layer on top.
Finish
Spread icing and coconut over each layer before serving.
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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Flour + raisintop 1% of all pairsSmell alikestrongCooked together9,075 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Milk + corntop 10% of all pairsSmell alikemoderateCooked together6,955 recipes
Shared aroma: hexanal (green, grassy).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Corn + flourtop 13% of all pairsSmell alikemoderateCooked together6,165 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 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 to stiff peaks, they trap air and give the cake its light, rising structure.
- Butter
- Creamed with the sugar, it adds richness and a tender crumb.
- Flour
- Provides the main structure that holds the cake together as it sets.
- Baking powder
- Releases gas in the batter so the cake rises and becomes airy.
- Powdered sugar
- Sweetens the batter and, creamed with butter, helps give a fine texture.
- Grated chocolate
- Flavours the middle layer and gives it a distinct chocolate taste.
The step that matters
Folding in the egg whites. Egg whites must be beaten to stiff peaks and folded in gently. Overmixing deflates the trapped air, so the cake bakes up dense instead of light.
Swap the raisin
How well each one fits the dish's main ingredients (sugar, butter, milk, corn, flour, egg, chocolate):
- Vanillafits better
- Coconutfits about as well
- Raisinthe original
- Figfits about as well
Fit is the average pairing score against sugar, butter, milk, corn, flour, egg, chocolate. 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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