*To make your own buttermilk, place 1 1/2 tbsp. white vinegar in a glass measuring jar and fill with milk up to the 1 1/2 cup mark.
Combine flour, sugar, baking powder, baking soda, and salt in a large mixing bowl. Whisk egg and butter into buttermilk. 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 cup of batter onto the skillet at a time, and cook until bubbles appear on the surface. Flip with a spatula, and cook until browned on the other side. Makes about 16 medium-sized, fluffy pancakes.
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