1. In a mixing bowl, whisk together flour, sugar, baking powder, and salt.

2. Gradually stir in milk and melted butter until the batter is smooth.

3. Heat a non-stick pan over medium heat and pour a ladleful of batter onto the pan.

4. Cook the pancake for 2-3 minutes until bubbles form on the surface, then flip and cook for another 2 minutes.

5. Repeat with the remaining batter, stack the pancakes, and serve warm with your favorite toppings.