A while back this recipe was posted on a buttercream thread:
4 egg whites
1 cup sugar
3.5 sticks butter, room temp
Put whites and sugar in a bowl over simmering water. Whisk until sugar is dissolved and mixture is warm to the touch. Remove from heat. Whip until cool. Add butter piece by piece. Whip like heck.
Here's my question - will this work for decorating frosting? I'm making a birthday cake for my one year old so it needs to be eye-catching and colorful!