After 10 minutes, add oil and vanilla extract to the milk-vinegar liquid. Stir to combine.Add the wet ingredients to dry, mix till the ingredients are just combined.Add 2 tablespoons of water at this point if the batter seems too thick. This is optional, I did't add it to my batter. Remember to not over-mix the batter.Fill the prepared cupcake liners ½ full with the cupcake batter.