Preheat the oven the 350 degrees, grease a small cake pan or loaf pan and set aside. In a small microwave-safe bowl or stovetop, melt your nut butter with your pure maple syrup. In a large mixing bowl, add the mashed sweet potato, nut butter, maple syrup and cocoa powder and mix very well. If using chocolate chips, stir them through. Pour the mixture into the greased pan and bake for around 20 minutes or until cooked through. Remove from the oven and allow to cool completely before slicing into pieces.
