In a bowl combine the all-purpose flour, cinnamon, sugar, baking powder, and salt.
In a separate bowl combine the oat milk and vinegar and let sit for 5 minutes to allow the milk to curdle. You can also add the vanilla, egg, and avocado oil after it sits.
Mix the wet into the dry mixture and let sit for 3-5 minutes until you see it start to get a bit airier from the baking soda.
Heat a skillet with avocado oil on medium heat prior to placing the batter.
Place a 1/3 cup full of batter into the pan and cook 2-3 minutes per side. You'll see bubbles start to form and then you can flip.
Remove the pancakes from the skillet once fully cooked and stack the pancakes on a clean plate. Serve and enjoy.