One-Bowl Sweet Potato Brownies {Paleo}

cooked and mashed sweet potato 1/4 cup coconut oil, melted 1/4 cup nut butter 1/4 cup honey/maple syrup 2 eggs 3/4 cup cacao powder 1/4 cup coconut flour 1 tsp vanilla 1/4 teaspoon salt 1 teaspoon cinnamon 1/2 cup chocolate chips + extra for topping