01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or lightly grease it.
02 - In a large bowl, whisk together flour, cocoa powder, sugar, baking powder, baking soda, and salt until evenly distributed.
03 - In a separate bowl, beat the eggs then add milk, vegetable oil, and vanilla extract, stirring until combined.
04 - Pour wet ingredients into dry ingredients and stir gently until just combined, avoiding overmixing for a tender crumb.
05 - Fold chocolate chips into the batter carefully to distribute evenly.
06 - Divide batter evenly into the muffin cups. Optionally, sprinkle extra chocolate chips on top for added texture.
07 - Bake for 18 to 20 minutes until a toothpick inserted in the center comes out with moist crumbs attached.
08 - Allow muffins to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely before serving.