Pipe a dollop of yellow buttercream into the center of the cupcake. This is to create some height, so it’s okay if it looks like a little dollop. Use more yellow buttercream to create the stamens, piping vertically on top of the dollop. Use the coral buttercream to pipe 3 petals around the stamens. Continue piping more layers of petals, starting each petal from the middle of each petal in the previous row. Slightly wiggling the piping tip as you pipe is going to create a more ruffled look.