Trending Square 50Th Anniversary Cakes : 2 2/3 cups sifted cake flour, 3 teaspoons baking powder, 1 teaspoon salt, 5 egg whites, 1 3/4 cups white sugar, 2/3 cup shortening, 2 cups milk, 1 teaspoon vanilla extract. Royal icing filigree, gold cachous and gold paint, simple icing rose. Square 50Th Anniversary Cakes - Royal icing filigree, gold cachous and gold paint, simple icing rose.