I've also heard this type of frosting referred to as "Mountain Frosting", not to be confused with White Mountain Icing or 7-Minute Icing, ... decorating. Fill and frost your layers, then lightly sprinkle ... icing soften a bit.
Cream the butter and sugar ... Beat the egg whites until stiff. Fold into the ... baking, prepare the frosting. Beat the egg whites ... also called White Mountain Cake and was sometimes baked ... white mountains of Colorado.
Sift flour, sugar, baking powder, ... tartar to egg whites. Beat until stiff peaks ... cool, spread Rocky Mountain Frosting over top and sides of cake.
Combine sugar, corn syrup, and ... cooks, beat egg whites with cream of tartar in ... high speed, until frosting is stiff and glossy. Beat ... Makes enough to frost two or three 8 inch cake layers.