Preheat oven to 350° F. Line an 8x8 dish with parchment paper and pour in mixture.
Combine flours, baking soda, baking powder, cinnamon and sugar in a large bowl. Add in mashed sweet potato. Stir in remaining wet ingredients. Mix in chocolate gems.
Top with marshmallows and extra chocolate! Bake for 25-30 min.
Eat warm out of the oven topped with vanilla ice cream or refrigerate overnight and cut into bars! Enjoy!