Preheat your oven to 425°F (220°C). Line the sheet pan with parchment paper and set aside.
In a large mixing bowl, combine the flour, sugar, baking powder, and salt. Whisk together until well mixed.
In another bowl, whisk together the eggs, milk, melted butter, and vanilla extract until fully combined.
Pour the wet ingredients into the dry ingredients and stir until just combined. Be careful not to overmix; some lumps are okay.
If desired, gently fold in any optional add-ins like chocolate chips or blueberries.
Pour the pancake batter evenly onto the prepared sheet pan, spreading it out to cover the surface.
Bake in the preheated oven for about 20 minutes, or until the pancake is lightly golden and a toothpick inserted into the center comes out clean.
Remove from the oven and let it cool for a few minutes. Cut into squares to serve.
Serve warm with your favorite toppings such as maple syrup, fresh fruit, or whipped cream.