Why it works: Chocolate and coffee match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and 1,497 recipes mention both. Both carry 2,3-butanedione, which smells buttery, creamy. The science ↓
The recipe
16 servingsIngredients
Contains: egg, milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.
Preheat the oven to 350°F (177°C). Grease a 9x13-inch baking pan with a little of the butter and dust it with some of the flour, tapping out the excess.
Place the chopped unsweetened chocolate in a bowl, pour the hot brewed coffee over it, and stir until completely smooth. Let it cool slightly.
In a large bowl, beat the remaining butter with the white sugar and brown sugar for about 5 minutes until light and fluffy.
Beat in the egg yolks one at a time, then mix in the vanilla extract and the cooled chocolate mixture until evenly combined.
Stir in the flour until just combined, taking care not to overmix.
In a clean bowl, beat the egg whites until stiff peaks form. Fold them into the batter in two additions until no white streaks remain.
Spread the batter evenly in the prepared pan and bake for 50 to 60 minutes, until a toothpick inserted in the center comes out clean and the center reaches 160°F (71°C).
Cool the cake in the pan on a wire rack for 20 minutes, then cool completely before cutting.
Dust the top with the confectioners' sugar and serve each slice with a spoonful of sweetened whipped cream.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
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Chocolate + coffeetop 2% of all pairsAroma overlapstrongMentioned together1,497 recipes
Shared aroma: 2,3-butanedione (buttery, creamy).
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Chocolate + vanillatop 2% of all pairsAroma overlapmoderateMentioned together10,018 recipes
Shared aroma: sotolon (curry, maple).
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Butter + creamtop 3% of all pairsAroma overlapstrongMentioned together41,494 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Vanilla + sugartop 3% of all pairsAroma overlaplowMentioned together35,031 recipes
Shared aroma: beta-damascenone (apple, rose).
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Coffee + vanillatop 4% of all pairsAroma overlapstrongMentioned together1,391 recipes
Shared aroma: sotolon (curry, maple).
Vanilla and sugar share little aroma chemistry, yet 35,031 recipes mention both: they likely work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
The Sunday pairing: one pairing, the chemistry behind it, and how to cook it. No spam, unsubscribe anytime.
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