Preheat Oven to 350 degrees.
Poke sweet potatoes with a fork and bake for 1 hour. You can cook the sweet potatoes a day before if you like.
Mix the cooked sweet potato in a mixing bowl, along with the rest of the ingredients.
Line an 8x8 Pan with parchment paper or grease the pan.
Pour brownie batter in your baking dish.
Bake at 350 degrees for 25 minutes.
Remove brownies and let cool.