Preheat and Prepare the Pan
Preheat your oven to 425°F (220°C). Line an 18x13-inch sheet pan with parchment paper and lightly grease with melted butter or cooking spray.
Mix Dry Ingredients
In a large mixing bowl, whisk together the flour, sugar, baking powder, and salt.
Combine Wet Ingredients
In another bowl, whisk together the eggs, milk, vanilla extract, and melted butter until well combined.
Make the Batter
Pour the wet ingredients into the dry ingredients and gently mix until just combined. Be careful not to overmix; a few lumps are fine and help keep the pancakes fluffy.
Pour and Spread
Pour the batter into the prepared sheet pan, spreading it out evenly with a spatula. Add any desired toppings, like berries, chocolate chips, or nuts, by sprinkling them over the batter.
Bake
Place the sheet pan in the preheated oven and bake for 12-15 minutes, or until the pancake is golden brown and a toothpick inserted in the center comes out clean.
Slice and Serve
Let the pancakes cool for a couple of minutes, then cut them into squares. Serve warm with your favorite toppings like syrup, whipped cream, or fresh fruit.