Preheat your oven to 350°F (175°C).
Generously grease a 9x13-inch sheet pan with cooking spray. Make sure to coat the corners and edges well so the pancakes release easily.
In a large mixing bowl, whisk together the dry ingredients: flour, baking powder, baking soda, salt, and sugar.
Add the the vanilla extract and cooled melted butter to the milk. Pour the mixture into the dry ingredients while whisking.
Add the eggs to the dry mixture and whisk until just incorporated, being careful to not over mix. A few lumps are okay.
Pour the batter into the prepared sheet pan and spread it out evenly.
Sprinkle your desired add-ins—like strawberries, blueberries, chocolate chips, or pecans—over the top.
Bake sheet pan pancakes for about 16-18 minutes, or until the top is lightly golden and a toothpick inserted in the center comes out clean.
Let cool for a few minutes before slicing. Serve warm with maple syrup and butter. Enjoy!