• Preheat your oven to 350F and spray a 24-count mini muffin tin with baking spray*
• Combine butter and chocolate chips in a large, microwave-safe bowl. Microwave for 30 seconds. Stir well, microwave for another 15 seconds and then stir well again. Repeat for 15 seconds until chocolate and butter are completely melted and well-combined.
  12 Tablespoons unsalted butter cut into Tablespoon-sized pieces, ½ cup (100 g) semisweet chocolate chips
• Stir in cocoa powder and instant coffee (if using).
  ½ cup (50 g) natural cocoa powder , ½ teaspoon instant coffee grounds
• Add sugars and stir again until combined.
  1 cup (200 g) tightly packed light or dark brown sugar, ½ cup (100 g) granulated sugar
• Add eggs and egg yolk, one at a time, stirring well after each addition. Stir in vanilla extract.
  2 large eggs + 1 large egg yolk, 1 teaspoon vanilla extract
• In a separate, medium-sized bowl, whisk together flour, baking powder, and salt.
  1 cup + 2 Tablespoons (140 g) all-purpose flour, ½ teaspoon baking powder, ½ teaspoon salt
• Add dry ingredients to wet and stir until well-combined.
• Drop batter by 1 ½ Tablespoon into prepared mini muffin tin (I like to use a cookie dough scoop to do this).
• Transfer to 350F (175C) oven and bake for 18 minutes or until a toothpick inserted in the center comes out clean or with a few fudgy crumbs (not wet batter!).
• Immediately take a rounded teaspoon or Tablespoon and press into each brownie bite to make a well (see photo in post for example).
• Allow brownies to cool completely before filling with frosting and decorating.
• While your brownie bites are cooling, prepare your frosting.

Frosting

• Combine butter and cream cheese in a large bowl and beat with an electric mixer until creamy, well-combined, and lump-free.
  ½ cup (113 g) 1 stick salted butter, softened, 8 oz (226 g) cream cheese softened
• Add vanilla extract and stir well to combine.
  1 teaspoon vanilla extract
• With mixer on low-speed, gradually add powdered sugar until completely combined.
  4 cups (500 g) powdered sugar
• If using just one color of frosting add it to your bowl until desired color intensity is reached (a little goes a long way with gel colorings! Start with less and add more as needed!). If using two colors, divide the frosting in half and mix the different colors in different bowls. Be sure to stir well so there are no streaks.
  Food coloring -- I used Americolor gel "mint green"*** and "regal purple"

To Decorate

• Spoon or pipe frosting into completely cooled brownie bites and decorate using sprinkles. Serve and enjoy!
  colored sprinkles, candy eyeballs