In a large mixing bowl, combine all-purpose flour, baking powder, salt, and sugar. Whisk until well-blended and lump-free.

Create a well in the center and add milk, egg, melted butter, and vanilla extract. Mix gently, leaving some lumps.

Preheat a non-stick skillet over medium heat for about 5 minutes and lightly grease with butter.

Pour 1/4 cup batter onto the skillet for each pancake. Cook until bubbles form and edges look set, about 2 minutes.

Flip the pancake gently and cook for 1 to 2 more minutes until golden brown.

Keep cooked pancakes warm in a low-temperature oven while you finish the rest.

Serve immediately with your favorite toppings like maple syrup, fresh fruit, or whipped cream.