Give your cakes and cupcakes a little love and make homemade buttercream frosting. This recipe infuses it with coffee grinds for a rich, decadent flavor.
Combine the confectioners' sugar and cocoa in a bowl and stir well to combine. Add the softened butter and mix in gently. Add the coffee liquid, a small amount at a time, and beat with electric beater until smooth and spreadable. You may not need all of the coffee liquid and you may also need to add slightly more.