In a large mixing bowl, whisk together flour, baking powder, salt, and sugar until well combined. Create a well in the center, then pour in milk, egg, melted butter, and vanilla extract. Gently fold until just combined, leaving a few lumps for fluffiness.

Preheat a non-stick griddle or skillet over medium heat for about 5 minutes. Lightly grease cooking surface with butter or oil.

Pour 1/4 cup of batter onto the heated griddle for each pancake. Cook until edges appear set and bubbles form, approximately 2-3 minutes. Flip and cook for another 1-2 minutes until golden.

Transfer pancakes to a plate and keep warm in a low oven while repeating. Serve immediately with syrup, fresh fruit, or whipped cream.