Preheat oven to 350°F. In a medium bowl, mix wet ingredients, sweet potato puree, 3 whole eggs, coconut oil, honey and vanilla. Then in a separate large bowl mix dry ingredients, coconut flour, cocoa powder, baking powder, cinnamon, salt and chocolate chips. Add wet ingredients into dry and mix well with a spatula, not in a stand mixer.
In a stand mixer with the whisk attachment, beat 2 egg whites beyond stiff then gently fold the egg whites into the combined mixture. Pour into a parchment paper lined 8x8 or 9x9 baking dish and bake for 30-35 minutes.
For extra deliciousness, melt 1 Tbsp of coconut oil with 1 Tbsp of dark chocolate chips and drizzle the chocolate sauce on top of the brownies.
*roast the sweet potato, let it cool, peel it and then blend in a food processor until the flesh is smooth