01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper for easy cleanup.
02 - Whisk together flour, cocoa powder, baking soda, and salt in a medium bowl until well blended.
03 - Beat butter, oil, granulated sugar, and brown sugar in a large mixing bowl until light and creamy, approximately 2 minutes.
04 - Add eggs one at a time, beating thoroughly after each addition. Mix in vanilla extract, red food coloring, and vinegar until fully incorporated.
05 - Gradually mix in the dry ingredients until just combined. Avoid overmixing to prevent tough cookies.
06 - Stir in white chocolate chips until evenly distributed throughout the dough.
07 - Scoop approximately 2 tablespoons of dough per cookie onto prepared baking sheets, leaving 2 inches of space between each.
08 - Bake for 11 to 13 minutes until edges are set and centers appear slightly soft. Do not overbake for optimal texture.
09 - Allow cookies to rest on baking sheet for 5 minutes before transferring to wire rack to finish cooling.