Preheat oven to 425 degrees F and line muffin tin with parchment paper muffin liners or use silicone muffin pan (I used both and didn't spray anything).
In a large mixing bowl, add eggs, applesauce, maple syrup, oil, vanilla, cinnamon, baking powder, baking soda, and salt. Whisk well to combine, making sure baking powder and soda have dissolved. Add flour and stir gently to mix. Do not over mix.
In a small bowl, toss blueberries with 1 tablespoon flour, add to the batter and give a few stirs.
Using large ice cream scoop, fill 12 openings of a muffin pan with batter. Bake for 10 minutes, reduce oven temperature to 375 degrees F, and bake for another 10 minutes or until toothpick inserted in the middle comes out clean.
Remove from the oven and let muffins cool for at least 30 minutes before transferring onto a cooling rack to cool more or enjoy.
Video
Notes
Store: Store in an airtight container in a cool dry place for up to 3 - 4 days.
Freeze: Bake and cool muffins completely. Arrange in a single layer in a resealable plastic bag or any container with a lid. Freeze for up to 3 months.
Do not overmix batter: Stir a few times, let batter sit and stir again. A few dry flour patches are fine.