This recipe for peanut butter banana cake in the Thermomix is perfect for those who love the combination of peanut butter and bananas. Made with peanut butter and chopped peanuts, this cake is rich and nutty. The recipe calls for ripe bananas, which are mashed and mixed with the other ingredients in the Thermomix. The mixture is then poured into a cake tin and baked in the oven until golden brown. Serve with a drizzle of honey or a sprinkle of chopped peanuts for a delicious peanut buttery treat.