In advance, using royal icing, make 15 tip 103 and 10 tip 102 roses with tip 7 bases; make 17 tip 102 rosebuds. Pipe a 1 1/4 in. diameter circle of white royal icing for boy topper base; pat smooth and let dry.
Ice 2-layer cakes smooth in buttercream and prepare for
stacked construction. Pipe tip 18 shell bottom borders. Position roses and buds; add tip 352 leaves. Attach boy topper to base with royal icing; position toppers.
Finish your petit fours or cupcakes with one pretty rosebud. Made in buttercream, this flat flower can be piped directly on the cake in your favorite colors. Or make them ahead using royal icing. On cakes, use the rosebud as an accent or in floral spray bouquet.