Banana Mug Cake

spelt, white, or oat flour

baking powder

salt

stevia, or 2 tsp sugar

plus 2 tsp water

overripe mashed banana (Banana-Free Version Here)

pure vanilla extract

For the top, combine: 1/4 tsp cinnamon, 2 tsp brown sugar or xylitol or sucanat, 2 tsp overripe mashed banana, tiny pinch salt, 1 tsp buttery spread OR 1 tsp more mashed banana, optional crumbled pecans or walnuts.