Rose Cake Decorating Tip. Just fill the piping bag with a firm buttercream icing and pipe out a variety of flowers directly onto your cake or cupcakes. They are perfect for decorating cakes, cupcakes, cookies and muffins. Easy to Use: The baking accessories included in this set are quite easy to use, which is why they are recommended for beginners or culinary masters. So you'll now create beautiful cupcake frosting designs, cupcake decorations, cake icing tips, frosting tips which are suitable for beginners. Easy To Handle, Easy to keep clean And Use.