01 - Preheat your waffle iron according to the manufacturer's instructions. Lightly grease the plates with cooking spray or melted butter once heated.
02 - In a large mixing bowl, whisk together the melted butter, whole milk, eggs, and vanilla extract until smooth and fully incorporated.
03 - In a separate medium bowl, sift together the granulated sugar, cocoa powder, all-purpose flour, baking powder, and salt. Whisk to evenly distribute.
04 - Gradually add the sifted dry mixture to the wet ingredients, folding gently with a spatula until just combined. Avoid overmixing to keep the texture tender.
05 - Gently fold the semisweet chocolate chips into the batter until evenly distributed throughout.
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. Carefully remove and repeat with the remaining batter.
07 - Serve the waffles warm on their own, or finish with whipped cream, fresh berries, a drizzle of chocolate sauce, or a scoop of vanilla ice cream.