Preheat oven to 350 degrees F. Line twelve 1/3-cup muffin cups with paper or foil muffin liners. Or alternately grease and flour 12 muffin tin cups.
Mix flour, sugar, baking powder and salt in a small bowl, set aside.
In a large bowl, use a potato masher or the back of a large spoon to mash the ripe bananas.
Add egg, milk, and melted cannabis butter and butter to the mashed bananas and mix with a large spoon until all ingredients are well incorporated
Stir the dry ingredients into the bowl until just combined, do not over mix.
Stir in chocolate chips.
Divide the mixture between the 12 muffin cups and sprinkle the tops with the coarse raw sugar.
Bake for about 25 minutes or until a toothpick inserted in center comes out without cake crumbs (melted chocolate is OK). Cool on a wire rack. If you plan to freeze, cool completely before wrapping and labeling.