Place reserved 1 cup Swiss Meringue Buttercream and any extra in a piping bag fitted with a small to medium rose piping tip. Pipe ribbons, flowers, squiggles, and other designs randomly over cake.

Preheat your oven to 180°C and line the base of four 8-inch sandwich tins with parchment and grease and flour the sides. Set aside. Beat the butter and sugar until pale and creamy. Alternate ...