In a medium-sized mixing bowl, whisk together the flour, sugar, baking powder, and salt until well combined.

Add the milk and egg to the dry mix, and mix gently until just combined.

Melt the butter and pour it into the batter, then stir gently until just combined.

Allow the batter to rest for about 10 minutes at room temperature.

Preheat your griddle or non-stick skillet over medium heat.

Pour 1/4 cup of batter for each pancake onto the hot griddle.

Cook until bubbles form on the surface, about 2-3 minutes, then flip and cook for another 2-3 minutes until golden brown.

Stack pancakes on a plate and serve warm with your favorite toppings.