Combine milk and vinegar in a medium bowl and set aside for 5 minutes to sour.
Combine flour, sugar, baking powder, baking soda and salt in large bowl. whisk together egg, butter, and milk. Pour the flour mixture into the wet ingredients and whisk until lumps are gone.
Heat a large skillet over medium heat and coat with cooking spray pour 1/4 cupfuls of batter onto the skillet and cook until bubbles appear on the surface flip with a spatula and cook until browned on the other side.