Instructions

1. Guinness Brownie Layer
2. Preheat oven to 350 degrees and coat a 9x9 pan with cooking spray and line with parchment paper for easy removal.
3. Combine flour, granulated sugar, cocoa powder, brown sugar, salt and baking powder in a large bowl.
4. Place 1/2 cup chocolate into a heat proof bowl and microwave until melted.  Whisk in butter, vanilla and Guinness.  Add eggs, one at a time and whisk until combined.
5. Fold in remaining 1/2 cup chocolate chunks.
6. Pour batter into prepared pan and bake for 20-22 minutes or until a toothpick inserted comes out clean.
7. Place pan on a wire rack to cool completely.

Jameson Ganache Layer

1. Once the brownies have cooled start by placing your chocolate into a medium size bowl and microwave until melted.
2. Whisk in butter, whiskey and powdered sugar. 
3. Let set for a minute and then spread evenly over brownies.  Allow to set up, about 5 minutes.

Baileys Buttercream Frosting Layer

1. In the bowl of your stand mixer fitted with the whisk attachment or into a large bowl, add in your softened butter and whip, scraping down the sides every minute, for 5 minutes.
2. Using 1/2 cup at a time, add in your powdered sugar.
3. Once all the powdered sugar has been incorporated add in your Baileys and vanilla extract.
4. If the frosting is not to your desired consistency and you'd like it thinner, gradually add in a teaspoon of milk until you've reach your desired consistency
5. Spread frosting on top of the ganache layer and cut into 12 equal squares.