If anyone could help me quickly, I would be very grateful.
I got an AMAZING frosting recipe from another website and I can't figure out if it needs refrigerating. I plan on using this frosting for a graduation cake for an open house on Sat. and because of the size of the cake, I cannot refrigerate it, and won't have time to decorate it Sat. am. I want to know if I decorate it tomorrow, and left it UNREFRIGERATED overnight, would it still be "safe" to eat on Sat.?

Here's the recipe:

1/2 cup butter, softened (you can use margarine but the flavor will not be the same)
2 2/3 cups confectioners' sugar
1/3 cup half-and-half cream or milk (can use unwhipped whipping cream in place of half and half)
1 1/2 teaspoons vanilla
3/4 cup unsweetened cocoa powder, sifted

Directions:
1. Cream the butter in a small bowl.
2. Blend in the cocoa powder, vanilla, confectioners sugar, alternately with the cream.
3. Beat with an electric mixer, until the desired texture is achieved.
4 **NOTE** because of the additional cocoa powder more cream may have to be added in to reach desired consistency.

Thanks again for your help!

Deb

With whipping cream it would have to go in the fridge, but I think with milk it would be fine to leave out. I always leave my buttercream with milk out for a couple of days, even, and it's fine.

As long as it's not more than 2 days it will be ok but also consider if it's too hot where you are. Why don't you put a fan near your cake, just to feel more safe?