Brownie-cake bars packed with chocolate, cookies, and colorful sprinkles for festive, fun gatherings.
# What You’ll Need:
→ Brownie-Cake Base
01 - 1 cup unsalted butter, melted
02 - 1 1/2 cups granulated sugar
03 - 1/2 cup packed light brown sugar
04 - 3 large eggs
05 - 2 teaspoons vanilla extract
06 - 1 cup all-purpose flour
07 - 1/2 cup unsweetened cocoa powder
08 - 1 teaspoon baking powder
09 - 1/2 teaspoon salt
→ Add-Ins
10 - 3/4 cup semi-sweet chocolate chunks
11 - 1/2 cup rainbow sprinkles
12 - 1 cup birthday cake-flavored sandwich cookies, roughly chopped
→ Frosting and Topping
13 - 1/2 cup unsalted butter, softened
14 - 2 cups powdered sugar, sifted
15 - 2 tablespoons milk
16 - 1/2 teaspoon vanilla extract
17 - Pinch of salt
18 - Additional rainbow sprinkles for topping
# How to Make It:
01 - Preheat the oven to 350°F. Line a 9x13-inch sheet pan with parchment paper, leaving an overhang for easy removal.
02 - In a large mixing bowl, whisk together the melted butter, granulated sugar, and brown sugar until smooth and glossy.
03 - Add the eggs one at a time, whisking thoroughly after each addition. Stir in the vanilla extract.
04 - Sift in the all-purpose flour, cocoa powder, baking powder, and salt. Fold gently until just combined, taking care not to overmix.
05 - Fold in the semi-sweet chocolate chunks, rainbow sprinkles, and chopped birthday cake-flavored cookies until evenly distributed throughout the batter.
06 - Spread the batter evenly in the prepared sheet pan. Bake for 23 to 25 minutes, or until the center is just set and a toothpick inserted yields moist crumbs. Do not overbake.
07 - Allow brownies to cool completely in the pan placed on a wire rack.
08 - Beat the softened butter with an electric mixer until creamy. Gradually add sifted powdered sugar, milk, vanilla extract, and a pinch of salt, continuing to beat until the frosting is light and fluffy.
09 - Spread the prepared frosting evenly over the cooled brownies. Decorate generously with extra rainbow sprinkles.
10 - Cut into squares and serve.
