I can't remember how to make a poinstta with buttercream icing

Use tip 352 and make 6 petals, then make 6 smaller petals on top and in between the bottom 6 petals. Place 5-6 yellow dots around the center and a center dot- use tip 1,2 or 3 forthe center. More dots may actually be used, I just can't remember.

This shows you how to make an RI pointsettia. It uses a lily flower nail, but I just make it on a regular flat flower nail. I've done it with buttercream and been pleased with the results. HTH

http://www.wilton.com/technique/Poinsettia