Preheat oven to 350 degrees F. Prepare muffin pan with liners and spray them with cooking spray.
Prepare muffin tin by placing 12 liners then spray with cooking spray (I use an avocado oil based one)
In a blender (or food processor), combine the applesauce, syrup, eggs, vanilla, oil and spinach and blend until smooth and the spinach is fully incorporated. Set aside.
In a large mixing bowl, combine the flour, baking powder, baking soda, and salt. Mix well.
Add the wet spinach mixture to the dry ingredients and combine until no lumps remain and the batter is smooth.
Fold in the chocolate chips.
Using a regular ice cream scoop, scoop the batter into the muffin tin (they shoudl be about ¾ full).
Bake about 18 minutes until cooked through and set. Remove and place on a cooking rack to cool completely.
Enjoy right away or save in an airtight container in the fridge for up to a week.