Invert cake onto wire rack; cool completely, about 2 hours. Whisk together powdered sugar, cocoa, butter, vanilla, espresso powder (if using), salt, and 2 tablespoons orange juice in a medium bowl ...
Ever wished you could make that cake recipe just a little bigger or smaller for the tins you have? Or know how much icing to cover a batch of cupcakes? Or how much fondant icing you need to cover ...