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
4 - 8x8 inch pansIngredients
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.
Heat the oven to 350°F (177°C) and set four 8x8 inch pans on the counter.
Set a heatproof bowl over a pan of barely simmering water. Add the semisweet chocolate chips and the softened butter, stirring until smooth. Let cool slightly.
In a small bowl, stir the instant coffee granules into the vanilla extract until dissolved.
In a large bowl, whisk the eggs and white sugar for about 3 minutes until pale and thickened.
Whisk in the melted chocolate mixture, the coffee and vanilla mixture, the cinnamon, and the salt until combined.
Fold in the all-purpose flour just until no dry streaks remain. Do not overmix.
Divide the batter evenly among the four 8x8 inch pans and spread level.
Bake 20 to 25 minutes until the tops look set and a toothpick inserted in the center comes out with moist crumbs. The eggs must be set, with the center at 160°F (71°C).
Cool the brownies in the pans for 15 minutes before cutting into squares.
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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Vanilla + cinnamontop 2% of all pairsAroma overlapstrongMentioned together5,287 recipes
Shared aroma: 4-methoxybenzaldehyde (sweet, anise).
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Chocolate + vanillatop 2% of all pairsAroma overlapmoderateMentioned together10,018 recipes
Shared aroma: sotolon (curry, maple).
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Sugar + vanillatop 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).
Sugar and vanilla 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
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