Combine milk with vinegar in a medium bowl and set aside for 5 minutes to “sour.”
Combine flour, sugar, baking powder, baking soda, and salt in a large mixing bowl. Whisk egg and butter into “soured” 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 cooing spray. Pour ¼ 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.
Recipe by Cohen Family Cookbook at https://cohenfamilycookbook.com/2015/01/pancakes/