In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt until well combined.
In a separate, medium-sized bowl, whisk together buttermilk, eggs, and vanilla extract.
Take your melted butter and slowly drizzle it into your wet ingredients while whisking, stirring until well combined.
Pour wet ingredients into dry ingredients and use a wooden spoon to stir until just combined — do not overmix your pancake batter or your pancakes will be flat. Use a light hand when stirring, and a few flour streaks in the batter are fine.
Heat a large nonstick griddle or skillet, preferably cast-iron, over low heat for about 5 minutes. Add one tablespoon of oil or butter, I prefer butter. to the skillet. Turn the heat up to medium-low and using a measuring cup, ladle ⅓ cup batter into the skillet. If you are using a large skillet or a griddle, repeat once or twice, taking care not to crowd the cooking surface. Flip pancakes after bubbles rise to the surface and bottoms brown, about 2 to 4 minutes. Cook until the other sides are lightly browned. Remove pancakes to a wire rack set inside a rimmed baking sheet, and keep in a heated oven until all the batter is cooked and you are ready to serve.