Begin by preheating your oven to 375°F (190°C). Prepare a large sheet pan by lightly greasing it with non-stick cooking spray.

In a spacious mixing bowl, combine the all-purpose flour, baking powder, salt, and sugar. Whisk thoroughly to ensure an even distribution of the dry ingredients.

Create a well in the center of the dry mixture, then pour in the milk, lightly beaten eggs, and oil (or melted butter). Mix gently until just combined. Be cautious not to overmix, as this could lead to dense pancakes. It is acceptable for the batter to remain slightly lumpy.

Transfer the batter to the prepared sheet pan, spreading it out evenly across the surface. If desired, sprinkle your choice of add-ins over the batter.

Place the pan in the preheated oven and bake for 12 to 15 minutes. The pancakes are ready when the center is set and no longer wobbles, with a light golden color along the edges.

Once baked, remove the sheet pan from the oven and cut the pancakes into squares. Serve with your preferred toppings and enjoy.