Whisk together flour, salt, baking soda, baking powder, and cinnamon in a bowl.
In a separate bowl, use mixers to beat together mashed banana, applesauce, maple syrup, brown sugar, and vanilla extract
Add dry mixture to wet, and use a rubber spatula to gently stir until just combined (do not over mix)
Line a muffin tin with parchment paper liners (these do not stick.) If you have regular paper liners, you will need to spray them with cooking spray to help avoid sticking.
Distribute batter evenly into the 12 muffin liners
Bake at 350 degrees for 20 - 25 minutes, until tops are cracked and toothpick inserted comes out clean
Serve cold or warmed up with vegan butter