1. Preheat oven to 350 degrees Fahrenheit.
2. Mash banana in a medium-large bowl, then add almond butter and mix. Add almond flour, coconut flour, cocoa powder, coconut sugar and mix. Finally, add coconut oil, baking soda, and vanilla, and mix to combine. You can add chocolate chips into the brownies, if desired, or save the chocolate for the topping.
3. Pour into a round or square eight-inch pan. Bake for 20 to 25 minutes. Let cool for five minutes.
4. Melt coconut oil and chocolate chips and mix until smooth, then drizzle over brownie pie. Store in the freezer to maintain freshness.