Preheat oven to 350 degrees & grease a small cake pan or loaf pan (set aside)
On the stove (low heat), melt down your nut butter and maple syrup (or honey) and add to mashed sweet potato and cocoa power in a large mixing bowl
Stir in additional ingredients if using
Pour the mixture into greased pan and bake for 20 mins or until cooked through
Remove from oven and allow to fully cool