Why it works: Vanilla and cinnamon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 5,287 recipes. Both carry 4-methoxybenzaldehyde, which smells sweet, anise. The science ↓
Chocolate Tartlets
Ingredients
Directions
Make the chocolate custard
Rub the grated chocolate smooth in the milk.
Heat the mixture over medium heat.
Add the dissolved cornstarch.
Stir until thickened.
Pour out and let cool.
Beat in the egg yolks, sugar, vanilla, cinnamon, and salt.
Bake and serve
Fill open pastry shells in patty pans with the mixture.
Bake until set.
Cover with meringue made from the egg whites and a little powdered sugar.
Let the meringue color slightly.
Serve cold.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Vanilla + cinnamontop 1% of all pairsSmell alikestrongCooked together5,287 recipes
Shared aroma: 4-methoxybenzaldehyde (sweet, anise).
-
Milk + vanillatop 5% of all pairsSmell alikemoderateCooked together19,187 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
-
Chocolate + vanillatop 5% of all pairsSmell alikemoderateCooked together10,020 recipes
Shared aroma: sotolon (curry, maple).
-
Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Sugar + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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
- Yolks thicken the custard and enrich it, while whites whip into the meringue topping.
- Cornstarch
- Starch swells in the hot milk, thickening the chocolate mixture into a firm custard.
- Baking chocolate
- Provides the chocolate flavor and body of the custard filling.
- Milk
- Forms the liquid base that the chocolate and cornstarch are cooked into.
- White sugar
- Adds sweetness and helps the meringue hold its structure.
The step that matters
Stir until thickened. Cornstarch must be fully heated in the liquid to swell and thicken; stopping too early leaves the custard thin and runny once cooled.
“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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Chocolate Cream171 recipes
Vanilla Ice Cream108 recipes
Chocolate Cookies76 recipes
Cinnamon Rolls71 recipes