Can you leave icing out that uses butter in it. The other ingredients are just powdered sugar, shortening and liquid.
You might want to PM indydebi, she has commented on this before. I'm not sure how or why, but if I remember correctly.........the sugar somehow perserves the other ingredients.
It sounds good anyway! All joking aside, I have never put mine in the fridge and three of my daughters and myself have birthdays in August. Never had a problem.
Most b/c's don't require refrigeration because the powdered sugar (which is hygroscopic) absorbs the moisture from the butter and small amount of liquid used).
Yes, its fine. I keep my just plain butter out too.