01 - Preheat the waffle iron according to the manufacturer's instructions and lightly grease the plates if needed.
02 - In a large bowl, whisk together the all-purpose flour, unsweetened cocoa powder, granulated sugar, baking powder, and salt until evenly distributed.
03 - In a separate bowl, whisk the eggs, melted butter, whole milk, and vanilla extract until smooth and fully incorporated.
04 - Pour the wet mixture into the dry ingredients and stir gently until just combined. Do not overmix. Fold in the semi-sweet chocolate chips until evenly dispersed.
05 - Spoon approximately 1/2 cup of batter onto the preheated waffle iron per waffle, adjusting based on your iron size. Close the lid and cook for 4 to 5 minutes until the edges are crisp and the centers remain fudgy.
06 - Carefully remove the waffles from the iron and serve warm. Enjoy plain or top with ice cream, whipped cream, fresh berries, or a dusting of powdered sugar.