Set oven to 415F.
Bake 2 large sweet potatoes until they are soft, approximately 1 hour. When the sweet potatoes have finished baking, allow them to cool to room temperature.
Set oven to 350F.
Grate the zucchini into a bowl and set aside.
In a large mixing bowl, add sweet potato and mash.
Add all of the remaining ingredients and thoroughly mix together.
Evenly divide batter among the individual muffin pan.
Bake in the oven for 30 minutes, or until you can insert a toothpick in the brownies and it comes out clear.