01 - Preheat the waffle iron according to the manufacturer's instructions. Lightly grease the plates if needed to prevent sticking.
02 - In a large mixing bowl, whisk together the flour, cocoa powder, sugar, baking powder, and salt until evenly distributed and no lumps remain.
03 - In a separate bowl, whisk the eggs, melted butter, milk, and vanilla extract until the mixture is smooth and fully emulsified.
04 - Pour the wet mixture into the dry ingredients and stir gently until just combined. Avoid overmixing to keep the texture tender. Fold in the chocolate chips until evenly dispersed.
05 - Spoon approximately 1/2 cup of batter onto the center of the preheated waffle iron for each waffle, adjusting the amount based on your iron's size. Close the lid and cook for 4 to 5 minutes until the edges are crisp and the centers remain soft and fudgy.
06 - Carefully remove each waffle from the iron using a spatula or fork. Serve warm on its own, or pair with ice cream, whipped cream, fresh berries, or a dusting of powdered sugar.