That's an idea, Mariah. Here in California it doesn't get too humid, or so I thought. I now have an atomic clock and it gives the humidity and sometimes it says it is 65%. I never would have thought it ever got that high.
I am still having trouble locating that recipe. Does anyone have a good recipe for a cake frosting that firms up like fudge? Maybe if I use someone else's recipe, I'll have better luck. I can't imagine what I did with the original recipe.