Preheat oven to 350.
Lightly grease a 12 piece muffin pan or line with paper liners and set aside.
In a large bowl, combine the oats, flour, baking powder, baking soda, salt, and cinnamon.
In a small bowl, mix the milk, maple syrup, coconut oil, eggs, and vanilla.
Pour the wet mixture into the flour mixture and mix until combined. Batter will be runny.
Evenly pour batter into the prepared muffin pan. Batter will almost fill each muffin cup.
Bake for 13-15 minutes, or until toothpick entered in center of muffin comes out clean.
Let cool and remove from pan.