Hi. No matter what buttercream I make (have tried Indydebi's and Crusting Buttercream Faux Fondant), when I put it on my cake there are always air bubbles. I pipe it onto the sides of the cake with the cake icer tip and then smooth with the angle spatula but I can't seem to get rid of the air bubbles. Does anyone know what I'm doing wrong? By the way - love both those icings.

#1 try mixing (at low speed) much longer - up to 10 minutes.
#2 make a bigger batch......you want the beater covered w/icing.
#3 Use as soon as you finish mixing. Any wait time will result in the formation of bubbles
#4 Get Sharon's (SugarShack) DVD on perfecting the art of B'cream! L)

Sometimes air bubbles are caused by beating the icing too much.