
Preheat oven to 350 degrees F, and grease or line a 12-cup muffin tin with cupcake liners.
Place banana, zucchini, spinach, egg, milk, butter, and vanilla extract in a high-powered blender and blend until smooth.
In a large mixing bowl, whisk together flour, coconut sugar, cocoa powder, baking soda, and sea salt.
Pour the blended mixture over the flour mixture, and stir until just combined. Be careful not to overmix.
Add chocolate chips and fold to combine.
Divide the batter in the prepared muffin tin. Top with more chocolate chips, if you want.
Bake for 23-26 minutes until a the toothpick inserted in the center comes out mostly clean with a few crumbs.
Cool for 10 minutes then remove the muffins from the muffin tin to a cooling rack. Enjoy!