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Fudgy Cosmic Brownie Cookies

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Inspired by the nostalgic Cosmic Brownies we all loved growing up, these Fudgy Cosmic Brownie Cookies are soft, ultra-chocolaty, and topped with a rich ganache and colorful candy pieces. They combine the chewy texture of a brownie with the convenience of a cookie – perfect for celebrations, school lunches, or anytime you crave a little joy.

Ingredients

Scale

For the cookies:

  • 1 cup (2 sticks) unsalted butter, softened
  • 1 ½ cups granulated sugar
  • ½ cup packed brown sugar
  • 2 large eggs
  • 1 tablespoon vanilla extract
  • 1 cup unsweetened cocoa powder
  • 1 ½ cups all-purpose flour
  • ½ teaspoon baking powder
  • ½ teaspoon salt

For the ganache topping:

  • 1 cup semi-sweet chocolate chips
  • ½ cup heavy cream

For decoration:

  • ¼ cup rainbow candy-coated chocolate chips or sprinkles

Instructions

  1. Preheat oven to 175°C (350°F). Line two baking sheets with parchment paper.
  2. In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
  3. Add eggs one at a time, beating well after each. Stir in the vanilla extract.
  4. Sift in cocoa powder and mix until fully combined.
  5. In a separate bowl, whisk together flour, baking powder, and salt. Gradually fold into the wet mixture until a thick dough forms.
  6. Scoop dough into balls using a medium cookie scoop. Place on prepared sheets, spacing 2 inches apart. Gently flatten each ball.
  7. Bake for 10–12 minutes. Cookies should look slightly underbaked in the center. Let rest on the tray for 5 minutes before transferring to a wire rack.
  8. To prepare ganache: heat heavy cream until simmering, pour over chocolate chips, and let sit for 1 minute. Stir until smooth.
  9. Spoon ganache over cooled cookies. Immediately decorate with rainbow candy chips or sprinkles.
  10. Let ganache set at room temperature or chill for 10 minutes. Serve once the topping is firm.

Notes

For best texture, avoid overmixing the dough.

Allow cookies to cool fully before applying ganache.

Store in an airtight container at room temperature for 3–4 days or refrigerate for up to a week.

These cookies freeze well both before and after baking.