Preheat oven to 350°F and prepare pans.
Mix espresso powder, Kahlua, and water.
Combine dry ingredients.
Add wet ingredients and beat until smooth.
Divide batter and bake 25–35 minutes.
Cool cakes 20 minutes, then remove.
Beat frosting ingredients until fluffy.
Layer cakes and frost.
Make ganache and whisk until smooth.
Pour over cake and decorate.
