01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or grease lightly with cooking spray.
02 - In a large mixing bowl, whisk together flour, cocoa powder, sugar, baking powder, baking soda, and salt until well blended.
03 - In a separate bowl, whisk eggs, milk, oil, and vanilla extract until smooth and fully incorporated.
04 - Pour the wet ingredients into the dry ingredients. Mix gently with a spatula until just combined—do not overmix. Small lumps are acceptable.
05 - Gently fold diced strawberries and semi-sweet chocolate chips into the batter until evenly distributed.
06 - Divide batter evenly among the prepared muffin cups, filling each about 3/4 full.
07 - Sprinkle mini chocolate chips over the top of each muffin for extra chocolate richness.
08 - Bake for 18–22 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs. Avoid overbaking for optimal moisture.
09 - Let muffins rest in the tin for 5 minutes before transferring to a wire rack. Cool completely before storing.