Brownies Pesta

Bahan-bahan (12 porsi)

• 1 box brownie mix (usually 16-18 ounces)
• 6 tablespoons butter
• 1/3 cup milk
• 1 1/4 cups granulated sugar
• 1 teaspoon vanilla extract
• 1/2 teaspoon coarse kosher salt
• 1 cup semi-sweet chocolate chips
• rainbow sprinkles