In a medium sized bowl, stir your oat flour, tapioca flour and salt. Add in your 1 1/2 cups of milk, maple syrup and oil. Whisk until a batter forms. The batter may seem thin, but it will thicken up while you wait for your pan to heat.
Heat a large skillet on medium heat for 2 minutes.
Once its hot, grease it with butter. Scoop out 1/2 cup of batter, pour it into the pan and swirl it around quickly to thin it out. I find the easiest way to do this is to remove the pan from the heat while you pour in the batter, and swirl it as your'e pouring it in.
Cook on a medium/low heat for 2 minutes, then flip and cook for 30-40 seconds.
Repeat with remaining batter, greasing the pan between each crepe. If the batter starts to thicken, add in more milk by the tbsp to thin it out.
Once done, top or fill with your favorite toppings.