Almond flour banana bread

* 2 cups almond flour
* 1 tsp baking powder
* 1/4 cup splenda brown sugar
* 1/4 tsp salt
* 1 tsp cinnamon
* 1/2 cup coconut oil
* 3 ripe bananas
* 2 eggs
* Chocolate chips or walnuts (optional)
* 1 tsp vanilla extract