Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Spanish 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 batter
Preheat the oven to 350°F (175°C).
In a mixing bowl, cream the butter and sugar together.
Add the egg yolks, milk, and cinnamon, and mix well.
In a separate bowl, combine the flour and baking powder, then gradually add to the wet mixture.
In another bowl, beat the egg whites until stiff peaks form, then gently fold them into the batter.
Bake and finish
Pour the batter into shallow tins and bake until golden.
Once cooled, spread caramel frosting between the layers and on top.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Flour + cinnamontop 9% of all pairsSmell alikemoderateCooked together17,341 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Cinnamon + milktop 10% of all pairsSmell alikemoderateCooked together12,655 recipes
Shared aroma: cuminaldehyde (Spicy, cumin).
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Sugar + cinnamontop 10% of all pairsSmell alikelowCooked together30,779 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Sugar and cinnamon barely smell alike, yet cooks put them together in 30,779 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
- Butter
- Creamed with sugar to trap air and give the cake a tender, rich crumb.
- Flour
- Provides the main structure that holds the cake together as it bakes.
- Sugar
- Sweetens the cake and helps it brown while creaming aerates the batter.
- Baking powder
- Releases gas in the batter so the cake rises and becomes light.
- Eggs
- Yolks add richness and binding; whipped whites add lift and airy structure.
- Milk
- Adds moisture and loosens the batter to a pourable consistency.
The step that matters
Folding in the egg whites. Whipped whites hold air that gives the cake its lift. Stirring or folding too vigorously deflates them, leaving a dense, flat cake. Fold gently with a spatula just until no white streaks remain.
“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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