In the bowl of your blender, combine the aquafaba, non dairy milk, water, flour, vanilla and salt with 3 tablespoons of the melted vegan butter.
Blend on high until well combined. Stop the motor, scrape down the sides and blend again for another minute. Transfer to the fridge for about 1-2 hours, or overnight.
When ready to make crepes, heat your crepe pan over medium heat. Brush with a little of the melted vegan butter.
Measure out about 1/4 cup of the crepe batter.
Take your crepe pan off the heat and pour the batter into the centre of the pan. Swirl the pan to distribute the batter in as large a circle as you can. Place back on the stove and cook for about 2-3 minutes, or until the crepe is set on that side. Carefully slide a thin metal spatula under the crepe and flip it. Cook an additional minute and then slide the crepe onto a plate.
Repeat for the additional batter.
Serve crepes warm with your favourite toppings or fillings.