Some of my sugar free Swiss meringue buttercream atop a Chocolate Cuffin. Traditionally, Swiss meringue buttercream is made by gently heating the egg white and sugar in a double boiler. However, my recipe (which is based off a recipe I’ve been using for a long time) does not cook the egg whites first.
Italian Meringue Buttercream Frosting is made from sugar, egg whites, and butter. Unlike American buttercream, it’s light, fluffy, and never cloying.
Add the cream of tartar, increase the speed to medium, and beat until soft peaks form. With the mixer running, pour the hot sugar syrup in a thin stream over fluffed egg whites. Beat until the egg whites are stiff and glossy. Spread the meringue over a hot cake or pie, and bake as directed.
It varies from American buttercream because it uses egg whites that are beat into a lovely meringue before adding loads of butter and it does not crust (American buttercream crusts, Swiss meringue buttercream stays soft). Some of my sugar free Swiss meringue buttercream atop a Chocolate Cuffin.