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Dessert

Quadruple Chocolate Brownies

A rich chocolate brownie made with multiple types of chocolate and a buttery batter.

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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 ↓

Quadruple Chocolate Brownies

Oven300°
Timeabout 35 minutes

Ingredients

Directions

Prepare the batter

  1. Preheat the oven to 300°.

  2. Line the bottoms of two 9‑by‑13‑inch baking pans with parchment paper.

  3. In a large saucepan, melt the butter with the unsweetened chocolate over low heat, stirring frequently, until melted.

  4. In a large bowl, whisk the sugar with the eggs, vanilla and salt.

  5. Add the melted chocolate and whisk until smooth.

  6. Add the flour and whisk until incorporated.

  7. Stir in 5 ounces of each of the chopped chocolates.

  8. Spread the batter in the prepared pans.

Marble and bake

  1. Place the remaining chopped chocolates separately in 3 small microwave‑safe bowls. Melt the chocolates.

  2. Using a spoon, drizzle the melted chocolates over the batter.

  3. Using a table knife, make swirls in the batter for a marbled effect.

  4. Bake the brownies for about 35 minutes, rotating the pans halfway through, until the tops are shiny and the brownies are set.

Cool and cut

  1. Transfer the brownies to a wire rack to cool completely.

  2. Cut the cooled brownies into squares.

Nutrition, whole recipe (rough)

1000Calories
29 gProtein
35 gFat
138 gCarbs
What these numbers assume: 8 portions
IngredientPortion assumedkcal
Flour1 cup (125g) all-purpose455
Chocolate1 oz (28g) semisweet155
Milk1 cup (244ml) whole149
Butter1 tbsp (14g)102
Egg1 large egg (50g)78
Sugar1 tbsp (12.5g) granulated49
Vanilla1 tsp extract (4ml)12
Salt1 tsp (6g)0

One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.

Recipe from the Recipes Wiki (Fandom).

Steps grouped into stages for easier reading; the method is the source's own.

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.

  1. Vanilla + milktop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

  2. Chocolate + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together10,020 recipes

    Shared aroma: sotolon (curry, maple).

  3. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  4. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

  5. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

Unsalted butter
Adds fat for a rich, tender crumb and moist texture.
Unsweetened chocolate
Provides the deep chocolate flavor and fudgy body of the brownies.
Sugar
Sweetens the batter and helps create a shiny, crackly top.
Eggs
Set during baking to give structure and a dense, fudgy texture.
All-purpose flour
Forms the gluten network that gives the brownies their structure.

The step that matters

Bake until the tops are shiny and the brownies are set. Overbaking dries the crumb and makes it cakey, while underbaking leaves the center wet and gummy. Rotating the pans helps the heat reach them evenly.

“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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