Why it works: Milk and butter 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 ↓
Mocha Tarts
Ingredients
Directions
Bake the cakes
Bake a white cake in thin layers and cut into small cakes.
Stack 2 or 3 layers together based on thickness.
Make the filling
In a bowl, mix sugar, flour, and salt.
Add slightly beaten eggs and scalded milk to the dry ingredients.
Cook in a double boiler for 15 minutes or until thick; cool and flavor.
Make the frosting
For frosting, beat butter and gradually add powdered sugar until creamy.
Mix in the cooled cream filling, melted chocolate, and vanilla extract.
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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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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Cream + chocolatetop 11% of all pairsSmell alikemoderateCooked together5,466 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter 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
- Eggs
- Thicken the custard as they set with heat, giving it body and structure.
- Flour
- Stabilizes the custard filling, helping it thicken smoothly and hold its shape.
- Butter
- Adds richness and a creamy texture to the frosting.
- Powdered sugar
- Sweetens the frosting and helps give it a smooth, creamy body.
- Baker's chocolate
- Provides the chocolate flavor and color that makes the tarts mocha.
The step that matters
Cook the custard in a double boiler. Gentle indirect heat lets the egg and starch mixture thicken evenly. Direct high heat can scramble the eggs or scorch the milk, leaving lumps or a grainy texture.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, flour, egg, milk, butter, cream, chocolate):
- Vanillafits better
- Raisinfits better
- Coconutfits better
- Lemonthe original
Fit is the average pairing score against sugar, flour, egg, milk, butter, cream, 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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