Hello Emily,
I suggest you go buy a bag of your favorite grain and some sugar cane and start grinding because both flour and sugar are processed and contain additives that increase the price. Its interesting that the 3 ingredients you hit on were all sweet "instant cake mix + CoolWhip + crushed pineapple". Only a small portion of the recipes in this site are for desert. I suggest you look beyond your sweet tooth and into the other 99% of the netcooks website where you can learn to cook "real" recipes from different countries from around the world. Really, it's no more difficult.
Busy Mom