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Cosmic Brownie Cookies

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Cosmic Brownie Cookies are rich, fudgy chocolate cookies topped with smooth chocolate ganache and colorful rainbow chips, combining nostalgic flavor with indulgent texture for a fun and irresistible treat.

Ingredients

2 1/2 cups all-purpose flour

1/2 cup unsweetened cocoa powder

2 teaspoons baking powder

1/2 teaspoon cream of tartar

1/2 teaspoon salt

1 cup salted butter, softened

2/3 cup light brown sugar, packed

1/2 cup granulated sugar

2 eggs

2 teaspoons vanilla extract

1 cup semi-sweet chocolate chips (for dough)

Chocolate Ganache: 1 cup semi-sweet chocolate chips, 1/4 cup heavy whipping cream

Rainbow chocolate chips, for decoration

Instructions

  1. Preheat oven to 350°F (175°C) and line baking sheets with parchment paper.
  2. In a medium bowl, whisk together flour, cocoa powder, baking powder, cream of tartar, and salt.
  3. In a large mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.
  4. Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.
  5. Gradually add the dry ingredients to the wet ingredients, stirring until just combined. Fold in 1 cup of semi-sweet chocolate chips.
  6. Drop spoonfuls of dough onto prepared baking sheets, spacing about 2 inches apart.
  7. Bake for 10–12 minutes, or until edges are set but centers remain soft. Cool on baking sheets for a few minutes, then transfer to a wire rack to cool completely.
  8. To make the ganache, heat heavy whipping cream until it begins to simmer. Pour over chocolate chips and stir until smooth and glossy.
  9. Spread or drizzle ganache over cooled cookies and top with rainbow chocolate chips.
  10. Allow ganache to set before serving.

Notes

Do not overbake to keep cookies soft and chewy.

Use dark chocolate chips or add espresso powder for a deeper chocolate flavor.

For a festive touch, substitute rainbow chips with holiday sprinkles or M&M minis.

Store cookies in an airtight container at room temperature for up to 5 days.

For a saltier-sweet flavor, sprinkle flaky sea salt on the ganache before it sets.

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