Whisk flour, sugar, baking soda, and salt together in a large bowl.
Make a well in the center of the dry ingredients and crack the egg into the well.
Pour buttermilk, vanilla, and butter onto the egg.
Break up the egg with a wooden spoon and then gently stir the batter until it's combined.
DON'T OVERMIX. There will be a few lumps, that's ok.
Set this aside while you preheat your non stick pan over medium/medium-high heat.
Once hot, spray the pan with cooking spray.
Using a 1/2 cup measuring cup, pour batter onto the skillet.
Cook 1-3 minutes, or until bottom is lightly browned.
Flip and cook an additional minute or so, until the pancake has cooked through.*
Spray with cooking spray and repeat with remaining batter.
Serve with maple syrup, peanut butter, berries, etc!