01 - Preheat the 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, granulated sugar, and brown sugar until light and fluffy. Add egg, milk, vanilla, and red food coloring. Mix until combined.
04 - Gradually add the dry ingredients to the wet mixture, mixing until just combined. Fold in white chocolate chips.
05 - In a separate bowl, beat cream cheese and butter until smooth. Add powdered sugar and vanilla, beating until creamy. Fold in crushed Oreo cookies. Refrigerate filling for 10 minutes to firm up.
06 - Scoop 2-tablespoon-sized portions of cookie dough and flatten slightly. Place 1 rounded teaspoon of Oreo filling in the center, then fold the dough around the filling, sealing edges to enclose.
07 - Place stuffed dough balls on prepared baking sheets, spacing at least 2 inches apart.
08 - Bake for 11 to 12 minutes, or until edges are set and centers look slightly soft. Cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.