01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, cocoa powder, baking soda, and salt. Set aside.
03 - In a large bowl, beat butter, brown sugar, and granulated sugar until light and creamy, approximately 2-3 minutes.
04 - Add egg, egg yolk, vanilla extract, milk, and red food coloring. Mix until thoroughly combined.
05 - Gradually add dry ingredients to wet mixture, mixing until just combined.
06 - Gently fold in white chocolate chips and chopped Oreo cookies.
07 - Using a medium cookie scoop or tablespoon, drop rounded dough balls onto prepared baking sheets, spacing 2 inches apart.
08 - Bake for 10-12 minutes until edges are set and centers appear slightly underbaked.
09 - Let cookies rest on baking sheet for 5 minutes, then transfer to wire rack to cool completely.