Mix dry ingredients: In a large mixing bowl, add flour, sugar, baking powder, and salt. Whisk well so everything is evenly combined.
Mix wet ingredients: In another bowl, whisk together milk, egg, and melted butter until smooth and fully combined.
Combine mixtures: Pour the wet ingredients into the dry ingredients. Stir gently until just combined. The batter should be slightly lumpy — do not overmix.
Rest the batter: Let the batter rest for 5-10 minutes. This helps the pancakes become lighter and fluffier.
Cook pancakes: Heat a non-stick pan or griddle over medium heat and lightly grease it. Pour batter onto the pan using a ladle. Cook until bubbles form on the surface and edges look set, then flip carefully.
Finish cooking: Cook the other side until golden brown and fully cooked through. Repeat with the remaining batter.
Serve warm: Serve immediately with syrup, butter, fruits, or your favorite toppings.