Why it works: Vanilla and milk are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓
Chocolate Filling
Ingredients
Directions
Heat the milk in a double boiler.
In a bowl, mix the sugar, flour, and salt with the lightly beaten eggs.
Gradually add the hot milk to the mixture.
Return the mixture to the double boiler and cook for 15 minutes.
Melt the chocolate and stir it into the mixture.
Allow the mixture to cool.
Add the 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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Vanilla + milktop 5% of all pairsSmell alikemoderateCooked together19,187 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
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Vanilla + chocolatetop 5% of all pairsSmell alikemoderateCooked together10,020 recipes
Shared aroma: sotolon (curry, maple).
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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 + vanillatop 12% of all pairsSmell alikemoderateCooked together19,241 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + chocolatetop 13% of all pairsSmell alikemoderateCooked together15,404 recipes
Shared aroma: guaiacol (smoky, sweet).
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
- Thicken the custard as they cook and bind the filling into a smooth, set texture.
- Flour
- Stabilises the custard and thickens it so it holds its shape when cooled.
- Sugar
- Sweetens the filling and helps soften the set texture of the custard.
- Milk
- Forms the liquid base of the custard and provides creaminess.
- Chocolate
- Adds the main chocolate flavour and richness to the filling.
The step that matters
Return the mixture to the double boiler and cook for 15 minutes. Eggs thicken only gently heated; too much heat curdles them. Cooking gently over a double boiler while stirring lets the flour and egg proteins thicken the custard evenly without scrambling.
“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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