01 - Preheat the oven to 375°F. Line two baking sheets with parchment paper to prevent sticking.
02 - In a large bowl, whisk together the melted butter, granulated sugar, and brown sugar until the mixture is smooth. Beat in the eggs one at a time, ensuring each is fully incorporated before adding the next. Add the milk and vanilla extract, mixing until the wet ingredients are well combined.
03 - In a separate bowl, sift or whisk together the flour, cocoa powder, baking powder, baking soda, and salt to ensure even distribution.
04 - Add the dry ingredient mixture to the wet ingredients. Stir gently with a spatula or wooden spoon until just combined; take care not to overmix to maintain a tender texture.
05 - Gently fold the semisweet chocolate chips into the batter until evenly distributed.
06 - Using a large cookie scoop or two tablespoons, drop approximately 1/4 cup portions of batter onto the prepared baking sheets. Space the mounds at least 2 inches apart to allow for spreading.
07 - Sprinkle a few extra chocolate chips on the top of each batter mound. Bake for 10 to 12 minutes, or until the tops are set and slightly firm while the centers remain soft.
08 - Allow the muffin tops to cool on the baking sheet for 5 minutes to firm up. Transfer them to a wire rack to cool completely.