Preheat oven to 350°F. Prepare muffin tin with cooking spray.
In a food processor/blender add all ingredients (except the chocolate chips) and blend on high, about 1 minute. Stir in chocolate chips or/any other toppings.
Fill each muffin 3/4 full with the muffin batter. Top each muffin with extra chocolate chips. Bake for 15-18 mins, or until the tops are set and a toothpick comes out clean.
Cool for 10 mins and enjoy!