Preheat your waffle iron according to the manufacturer's instructions.
In a large bowl, whisk together the flour, sugar, baking powder, and salt.
In another bowl, beat the eggs, then add the milk, melted butter, and vanilla extract. Mix well.
Pour the wet ingredients into the dry ingredients and mix just until combined. Do not overmix.
Fold in the chocolate chips gently into the batter.
Lightly grease the waffle iron and pour enough batter to fill the grid. Close and cook until golden brown.
Repeat with the remaining batter. Serve warm with your favorite toppings.