Grease a 9×13-inch sheet pan generously with butter or line it with parchment paper. Preheat your oven to 425°F (220°C).
In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
In another bowl, whisk together the buttermilk, eggs, melted butter, and vanilla extract until smooth.
Pour the wet ingredients into the dry ingredients and stir gently with a spatula or whisk.
If you wish, you can also add different toppings into the batter such as chocolate chip, blueberries, etc.
Pour the batter into the prepared sheet pan and spread it evenly to the corners with a spatula.
Customize with different toppings as you wish.
Bake the pancakes for 13–15 minutes, or until the top is lightly golden and a toothpick inserted in the center comes out clean.