Preheat oven to 375 degrees F and line muffin tin with parchment paper liners and spray with cooking spray. Set aside. Grate apples.
In a large mixing bowl, add eggs, applesauce, maple syrup, oil and vanilla extract. Whisk well to combine. Then add cinnamon, baking powder, baking soda, and salt. Whisk very well again, making sure baking powder and soda are dissolved.
Add grated apples and stir. Add flour and stir gently just enough to combine. Do not over mix.
Using large ice cream scoop, fill muffin 12 tin openings with batter. They will be very full. Bake for 23 minutes or until toothpick inserted in the middle comes out clean.
Remove muffins from the oven, let cool in the tin for 10 minutes and then transfer to a cooling rack to cool until room temperature or completely.
In a medium bowl, combine sugar and cinnamon, whisk. Brush each muffin top with coconut oil and dip it into cinnamon sugar until well coated. Repeat with remaining muffins.
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Notes
Store: Store in an airtight container in a cool dry place for up to 3 days or in a fridge for up to 5 days.
Freeze: Bake and cool muffins completely. Arrange in a single layer in resealable plastic bag or any container with a lid. Freeze for up to 3 months.
Apples: Best apples to use are any sweet variety like Honeycrisp, Fuji, Pink Lady or Gala apples work. You can also use one sweet apple and one tart apple like Granny Smith. Grated is better than chopped, and it's up to you if you want to peel it or not.