- Preheat oven to 350° F. Prepare a standard muffin tin with paper liners.
- In a bowl, whisk together flour, oats, baking powder, baking soda and salt.
- In a separate bowl, mash banana and avocado together. Add applesauce, egg and milk. Stir to combine, then stir into flour mixture.
- Fold in blueberries and divide batter into prepared muffin tin.
- Bake 25-30 minutes. Allow to cool completely. Store leftovers in an airtight container up to 3 days.