Swiss Meringue Buttercream is a silky and smooth frosting that can be made with the assistance of a food processor. The food processor can be used to whip the egg whites and sugar together until stiff peaks form. The mixture is then heated over a double boiler until the sugar is dissolved. Once cooled, butter is added to the mixture, and it is whipped until light and fluffy. Swiss Meringue Buttercream is perfect for frosting cakes and cupcakes.
