Someone brought homemade brownies and instead of icing them, just set out two tubs of frosting (one Devils food and one cream cheese white). At first I thought "geez, how lazy can you be?" Then I thought about it, and it works. Not everyone likes icing, nor does everyone like the same flavor, amount, etc. Just open the tubs, stick a clean knife in each, and hope no one picks the knife. I would transfer the frosting a to pretty bowls, but that's just me.
This would be great for office dessert, casual potluck, etc. 4951