Whisk flour, sugar, baking powder, baking soda, and salt in a large bowl.

In another bowl, beat buttermilk, eggs, melted butter, and vanilla until combined.

Pour wet into dry and stir until just mixed; small lumps are fine.

Heat griddle over medium and brush with butter. Scoop 1/4 cup batter per pancake.

Cook until bubbles form, flip, and cook 1–2 minutes more. Keep warm on a sheet in a low oven.