Preheat your oven to 325 degrees and lightly grease a muffin pan.

In a medium bowl, whisk together the flour, baking soda, baking powder, and salt.

In the bowl of a stand mixer or a large bowl, cream together the coconut oil and granulated sugar.

Add the eggs and vanilla, beating after each addition. Once fully combined, add the flour mixture 1/3 at a time. 

Once the flour is fully incorporated, fold in the banana and chocolate chips.

Using an ice cream scoop, scoop the muffin mix into the muffin tin, filling them 3/4 of the way full.

Bake at 325 degrees for 25 minutes, until a toothpick poked in the center of the muffin comes out clean.