Preheat waffle iron and spray with non-stick cooking spray.

Combine all dry ingredients (flour, sugar, salt, and baking powder) in a large mixing bowl and stir until thoroughly combined. In a separate, medium bowl, combine the wet ingredients (eggs, sourdough starter, melted butter, and milk. Pour the wet ingredients into the dry and gently stir until just combined. The batter will still have some lumps, but there should be no dry spots. Add chocolate chips and gently mix in.

Scoop the batter into the hot waffle iron, about a half cup at a time, depending on the size of your iron. Cook until golden brown.

Remove waffles to a cooling rack while you cook the remaining waffles. Keep warm in a 200-degree oven if desired. Serve with syrup and butter or with whipped cream and fruit.