Combine milk with vinegar and set aside for 5-10 minutes to sour

Once soured, whisk in egg and butter

In medium bowl, combine all dry ingredients

Whisk in milk mixture until smooth (do not whisk too much our you will have a dense pancake)

Stir in vanilla

Set aside for 30 minutes (batter will get frothy, but do not stir again)

Coat griddle with cooking spray and heat to 300*

Pour 1/4 cupfuls of batter onto griddle

Cook until top starts to bubble and bottom is browned

Flip and cook until other side is browned

Serve warm with butter and syrup!