Not sure exactly what jogged my memory and desire for this Tupperware recipe, but I decided to try it out again on our last camping trip. I made this years ago when I was friendly with a local Tupperware distributor and thought my girls would be thrilled to know you can make a cake in the microwave. I still use my Tupperware Microsteamer (shown below) for other purposes, so I packed it along for our trip to the Poconos.
If you happen to own a Tupperware Microsteamer, or are so intrigued by the recipe that you decide to purchase one, I've shared the recipe below. As written, the recipe worked great on our camping trip. Our hybrid travel trailer has a typical microwave. I just made the cake at home and for future reference, I need to decrease the cooking time by a minute or so for my more-powerful home microwave.