3/4 cup strong hot coffee

3 tsp instant espresso powder

3/4 cup dark cocoa

3/4 cup unsalted butter, room temperature

2 cups brown sugar

3 large eggs, room temperature

2 1/2 cups flour

1 cup buttermilk, room temperature

1 tsp baking soda

1 tsp baking powder

1 tsp kosher salt

1 tsp vanilla extract

2 tbsp mayonnaise, room temperature

Bailey’s Swiss Meringue Buttercream
5 egg whites
1 cup + 2 tbsp sugar
2 cups of unsalted butter at room temperature
1 tsp pure vanilla
pinch of salt
Bailey’s to taste