01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk flour, cocoa powder, baking soda, and salt in medium bowl. Set aside.
03 - Beat softened butter, granulated sugar, and brown sugar in large bowl until light and fluffy, about 2-3 minutes.
04 - Add eggs one at time, beating well after each. Mix in vanilla, red food coloring, and vinegar until smooth.
05 - Gradually add dry ingredients to wet ingredients, mixing just until combined.
06 - Fold white chocolate chips into dough until evenly distributed.
07 - Drop dough balls (about 2 tablespoons each) onto prepared baking sheets, spacing 2 inches apart.
08 - Bake for 11-13 minutes until edges are set and centers appear slightly soft.
09 - Let cookies cool on baking sheet for 5 minutes, then transfer to wire rack to cool completely.