01 -
Preheat the oven as indicated on the brownie box. Line an 8x8 square baking pan with parchment paper and set it aside. Mix the brownie packet with the ingredients listed on the package instructions. (Consider substituting the indicated ¼ cup water for ¼ cup Baileys Irish Cream liqueur in the brownie recipe for extra flavor). Bake brownies in the prepared pan according to the package instructions. Cool brownies completely before proceeding.
02 -
Prepare the buttercream layer by beating together butter, vanilla extract, and powdered sugar in a mixing bowl until combined. With the mixer running at low speed, pour two tablespoons of Baileys into the buttercream mixture and continue beating. Add whipping cream 1 tablespoon at a time while continuously beating until a fluffy, smooth frosting forms.
03 -
Use an offset spatula to spread the buttercream in an even layer over the top of the cooled brownies. Place brownies in the freezer while you prepare the ganache to help the frosting firm up.
04 -
Combine ⅓ cup heavy cream and 2 tablespoons of Baileys in a heatproof bowl. Microwave for 45 to 60 seconds until the cream mixture is just coming to a simmer. Pour hot cream over 1 cup of chocolate chips. Let sit for 3 to 4 minutes. Stir the chocolate mixture until a smooth ganache forms.
05 -
Spread ganache over the chilled, frosted brownies. Allow ganache to set (either on the countertop for 45 to 60 minutes or in the refrigerator for about 15 minutes). Lift brownies from the tray by the flaps of parchment paper. Cut into even squares and serve immediately.