Combine the flour, baking powder, salt, and sugar in a mixing bowl.
In a separate bowl, whisk the eggs, milk, and melted butter together until well blended. Stir the wet ingredients into the dry and mix gently. Don't overmix.
Preheat your griddle or pan over medium-high heat (375°F). To test the temperature, flick a few drops of water onto the pan. If they spatter and evaporate immediately, the pan is ready.
Use a paper towel dipped in cooking oil to oil the surface of the preheated pan.
Pour the batter onto your pan or griddle in 1/3 cup portions (see notes). Cook on the first side until the edges look dry and some bubbles form and burst on the top surface.
Use a thin spatula to turn the pancakes and continue cooking until they're golden on the second side.
To keep cooked pancakes warm while you cook additional batches, place them in a single layer on a wire rack set over a baking sheet and transfer to a preheated 200°F oven.
Notes
ABOUT THE BATTER CONSISTENCY: One-third (1/3) cup of batter should make a 4 to 4-1/2 inch diameter pancake. We recommend starting with a single pancake to test your batter and the temperature of your pan. If your test pancake turns out bigger than 4-1/2 inches, your batter is too thin.To thicken it, combine 1 or 2 tablespoons of flour with just enough water to make a paste, then stir into your batter.If your batter is too thick and hard to work with, thin it with a little extra milk or water.