Transfer the cake mix to a non-stick tin and bake for around 20 minutes. The cake should be golden on top and slightly bouncy but firm. You can check with a cocktail stick and if it comes out clean the cake is cooked. Cook for longer if needed. You are not using any ingredients that you can't eat raw, but you you want it to be cooked through. Decorate with dehydrated banana (you can use date paste or nut butter to stick them on).