It is Betty Crocker white vanilla icing right out of the can, with about 100 drops of blue food coloring in it. It tastes the same as out of the can! It stains everything it touches, including teeth and tongues, and I make no promises re: long-term toxicity, but it tastes fine.

I usually do a homemade icing recipe even if I'm cheating on the cake, because I like the texture it comes out to and it's less sweet, but the recipe I generally use has egg in it, and we had a no-eggs person coming, so I wanted to be able to ice something for him too.