01 - Preheat your waffle iron according to the manufacturer's instructions and lightly grease the plates.
02 - In a large bowl, whisk together the melted butter, whole milk, eggs, and vanilla extract until smooth and well combined.
03 - In a separate bowl, sift together the granulated sugar, unsweetened cocoa powder, all-purpose flour, baking powder, and salt until evenly distributed.
04 - Gradually add the dry ingredient mixture to the wet ingredients, stirring gently until just combined. Be careful not to overmix.
05 - Gently fold the semisweet chocolate chips into the batter using a rubber spatula.
06 - Pour approximately ½ cup of batter onto the center of the preheated waffle iron. Close the lid and cook for 3 to 4 minutes, until the exterior is crisp and the center remains fudgy.
07 - Carefully remove the cooked waffle and repeat with the remaining batter. Serve warm with whipped cream, fresh berries, or a drizzle of chocolate sauce.