In a large mixing bowl, whisk together the dry ingredients - flour, sugar, baking powder, and salt until well combined.

In a separate bowl, whisk together the wet ingredients - milk, egg, melted butter, and vanilla extract until smooth.

Gently fold the wet mixture into the dry ingredients until just combined, leaving some lumps.

Preheat a griddle or frying pan over medium heat, about 350°F (175°C). Test readiness with water drops.

Scoop about 1/4 cup of batter onto the hot griddle, cooking for 2-3 minutes until bubbles form. Flip and cook 1-2 more minutes.

Keep cooked pancakes warm in a low oven while cooking the remaining batter.