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Marshmallow Swirl Creme Egg Brownies

These Marshmallow Swirl Creme Egg Brownies are too decadent for words! Super fudgy brownies, packed with smashed Creme Eggs and swirled with sweet, sticky marshmallow fluff—a chocolate-filled treat for Easter!

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Why it works: Butter and egg match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and 118,511 recipes mention both. Both carry nonanal, which smells fat, citrus. The science ↓

The recipe

Serves 12
Prep15 min
Cook40 min

Ingredients

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.

  1. Heat the oven to 350°F (175°C). Line an 8-inch square pan with parchment, leaving overhang on two sides.

  2. Melt the bittersweet chocolate and unsalted butter together in a heatproof bowl over a pan of barely simmering water, stirring until smooth. Let cool slightly.

  3. In a bowl, whisk the large eggs, light brown sugar and vanilla until smooth. Stir in the melted chocolate mixture.

  4. Sift the flour, cocoa powder, baking powder and salt over the batter and fold gently until just combined.

  5. Roughly chop the mini creme eggs and fold them into the batter.

  6. Spread the batter evenly in the prepared pan. Dollop the marshmallow fluff over the top and swirl it in gently with a knife.

  7. Cut the four full size creme eggs in half and press them cut side up into the batter, spacing them evenly.

  8. Bake for 30 to 35 minutes, until the top is set and a toothpick inserted in the center comes out with moist crumbs, not wet batter.

  9. Cool in the pan for at least 1 hour, then lift out with the parchment and cut into 12 squares.

By tastykitchen. Recipe from Open Recipes.

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.

  1. Butter + eggtop 8% of all pairs
    Aroma overlapstrong
    Mentioned together118,511 recipes

    Shared aroma: nonanal (fat, citrus).

  2. Chocolate + cocoa powdertop 2% of all pairs
    Aroma overlapstrong
    Mentioned together1,587 recipes

    Shared aroma: 2-ethyl-3,6-dimethylpyrazine (roasted, nutty).

  3. Chocolate + vanillatop 2% of all pairs
    Aroma overlapmoderate
    Mentioned together10,018 recipes

    Shared aroma: sotolon (curry, maple).

  4. Sugar + vanillatop 3% of all pairs
    Aroma overlaplow
    Mentioned together35,031 recipes

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

  5. Vanilla + cocoa powdertop 4% of all pairs
    Aroma overlapmoderate
    Mentioned together2,189 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