01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together flour, cocoa powder, baking soda, and salt in a medium bowl.
03 - Beat butter, granulated sugar, and brown sugar until light and fluffy.
04 - Add eggs one at a time, beating well after each. Mix in milk, vanilla, vinegar, and food coloring.
05 - Gradually add dry ingredients to wet, mixing just until combined.
06 - Fold white chocolate chips into dough.
07 - Scoop tablespoon-sized dough balls onto baking sheets, spacing 2 inches apart.
08 - Bake 10-12 minutes until edges are set but centers remain soft.
09 - Cool on baking sheet 5 minutes, then transfer to wire rack.