Hi Kathy,

There have been some good recipes for bakery-style frostings shared here. If you click the Search button at the bottom of this message and in the search box that appears on the right enter: bakery frosting

I know you're looking for a buttercream frosting, but I thought I'd include this old newsgroup posting (I haven't tried it):

Forum: rec.food.baking
Date: 07/19/1999
Author: Kathie Dixon

Whipped Cream Frosting

I use one small box of white chocolate instant pudding mix and one-fourth cup milk with one pint whipping cream. Whip until it is thick.
You can make chocolate mousse frosting by using this recipe with chocolate pudding mix.
It holds up very well.

Happy Baking,

Betsy
recipelink.com