There are times when even the best store-bought frosting just won't cut it. If you're going to go to the trouble of making a cake or cupcakes from scratch, you want to finish it with something ...

Cook the egg whites. In a heatproof medium bowl, combine the egg whites and granulated sugar and whisk well. Set the bowl over a pot of steaming-hot (but not simmering) water and whisk until the ...