Pre-heat the oven to 350F.
Combine flour, baking soda, cinnamon, ginger, nutmeg and salt
Combine granulated sugar, brown sugar, coconut oil, eggs and butter in a large mixing bowl.
Combine pumpkin puree, mashed banana and vanilla extract.
Mix wet ingredients until combined.
Add wet ingredients to the dry ingredients.
Fold together but do not over mix. Mix until no dry flour is visible.
Grease muffin pan with some coconut oil or spray oil.
Fill muffin tin sections with about 3/4 of batter.
Bake for 15-20 min. Check at 15 and insert toothpick to check for doneness. Clean toothpick means they are ready to be removed. Cook 1-2 min more until you get a passing toothpick test.