I had problems with melting the chocolate, butter and cheese in the microwave. it didn't really melt in 3 mins. and eventually it seized up on me, but I mixed it into the sugar anyway and it seperated on me! I didn't want to count it a total loss, so I microwaved it again for a few minutes and lots of mixing, and it was fine. In fact, it was a hit, and very tasty. I'd make it again, but next time I think I'd melt the ingredients over a double boiler.