Preheat the oven to 350ºF.
Cook the sweet potato in an oven or microwave until soft. Cut it in half lengthwise, and scoop out the flesh into a large bowl.
Mash the sweet potato with a fork until there aren't any large chunks. Add the wet ingredients to the mashed sweet potato, and mix until combined.
Combine the dry ingredients in a small bowl (including the chocolate chips), and slowly add it to the wet ingredients.
Line an 8" square baking pan with parchment paper, and give it a quick spray with coconut oil. Pour the brownie batter into the pan, and pop it in the oven.
Bake the brownies at 350ºF for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean.
Transfer the brownies to a cooling rack, and move on to the frosting.
Add the chocolate chips, coconut oil, and maple syrup to a small bowl. Heat it in the microwave for 20 to 30 seconds, until the chips begin to melt. Mix it thoroughly.
Spread the frosting over the cooled brownies before cutting.
Cut into 12 or 16 squares (depending on how big you want your brownies!).
Enjoy! And come back to let me know how you like them!