01 - Preheat your waffle iron according to the manufacturer's instructions.
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, cocoa powder, all-purpose flour, baking powder, and salt.
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 - Lightly grease the waffle iron. Pour approximately ½ cup of batter into the center of the iron and close the lid. 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.