I was at my local bakery last night, and asked about their icing. They have a base, and then add ingredients, but wouldn't tell me what or where to get the base. They would sell me the made icing for $4.00 a pound though. I was making a Wilton white buttercream with shortening, powdered sugar, vanilla and powdered egg whites. I don't mind if it isn't totally white, I just want it to taste good. Like the white one at the bakery!! Thanks for everyone's help.