Mix together dry ingredients (flour, sugar, baking powder, baking soda)
Add in the wet ingredients (aquafaba, oat milk, melted vegan butter and vanilla) and mix well with hand or stand mixer. You want the batter to be quite thin and runny.
Melt a small amount of vegan butter onto crepe pan.
Pour a thin layer of batter onto the pan and cook on medium high heat flipping when bubbles stop forming. Cook opposite side until slightly browned (roughly 1 minute).