In a large bowl, whisk 2 cups all-purpose flour,1/4 cup granulated sugar, 2 teaspoons baking powder, and 1/2 teaspoon salt until evenly combined.
In another bowl, whisk 2 cups milk, 2 large eggs, 1 teaspoon vanilla extract, and 4 tablespoons melted butter until smooth.
Pour wet ingredients into dry ingredients and stir gently until just combined. Small lumps are fine.
Fold in 1 cup chocolate chips evenly through the batter.
Heat a skillet or griddle over medium heat and lightly grease with butter.
Pour about 1/4 cup batter per pancake onto the hot surface.
Cook until bubbles form and edges look set, then flip and cook until golden brown.
Serve warm with Maple syrup and Whipped cream or extra chocolate chips.