01 - Preheat the waffle iron according to the manufacturer's instructions and lightly grease if necessary.
02 - In a large bowl, whisk together the flour, cocoa powder, sugar, baking powder, and salt until well combined.
03 - In a separate bowl, whisk the eggs, melted butter, milk, and vanilla until smooth.
04 - Pour the wet ingredients into the dry mixture and stir gently until just combined. Do not overmix. Fold in the chocolate chips.
05 - Spoon approximately 1/2 cup of batter onto the preheated waffle iron per waffle, adjusting based on your iron size. Close and cook for 4 to 5 minutes until set with crisp edges and fudgy centers.
06 - Carefully remove the waffles and serve warm. Enjoy plain or topped with ice cream, whipped cream, or fresh berries.