Fluffy Pancakes

This is a recipe I got from the Internet. It's not mine. However, it is a good one.

3/4 cup milk
2 tsp white vinegar
1 cup all-purpose flour
2 tsp white sugar
1 teaspoon baking powder
1/2 teaspoon baking soda
1 egg
2 tsp butter, melted
cooking spray

1) Milk + vinegar. Aside for 5 mins to "sour"
2) Flour + sugar + baking powder + baking soda + salt
3) Egg + butter into soured milk
4) Flour mixture into no. 3
5) Large skillet medium heat + cooking spray
6) 1/4 cups of batter into that until bubbles