Step 1: In a large mixing bowl, combine the dry ingredients: all-purpose flour, baking powder, white sugar, and salt. Whisk them together thoroughly to ensure even distribution.
Step 2: In a separate bowl, whisk together the wet ingredients: milk, melted butter, egg, and vanilla extract until well combined.
Step 3: Pour the wet ingredient mixture into the dry ingredient mixture. Stir gently with a whisk or spoon until just combined. A few lumps are perfectly fine; overmixing can lead to tough pancakes.
Step 4: Heat a nonstick skillet or griddle over medium heat. Lightly grease the pan if necessary. To test if it's ready, a drop of water should sizzle and evaporate immediately.
Step 5: Scoop about ⅓ cup of pancake batter onto the hot skillet for each pancake. Cook for 2-3 minutes, or until bubbles begin to form on the surface and the edges look set and slightly golden.
Step 6: Carefully flip each pancake with a spatula and cook for another 1-2 minutes, or until the bottom is golden brown and cooked through.
Step 7: To keep pancakes warm while you finish cooking the batch, place them on a plate and cover loosely with a clean kitchen towel or foil.
Step 8: Serve your warm, fluffy pancakes immediately with your favorite toppings like butter, maple syrup, fresh berries, or whipped cream. Enjoy!