Preheat your oven to 350°F (175°C) and line baking sheets with parchment paper.
In a medium bowl, whisk together the flour, cocoa powder, baking powder, and salt until well combined.
In a large bowl, cream the softened butter and granulated sugar together until light and fluffy, about 3-5 minutes.
Add the egg, food coloring, and vanilla extract to the butter mixture, mixing until fully incorporated.
Gradually add the dry ingredients to the wet mixture, stirring until combined. Avoid overmixing.
Fold in the crushed Oreo cookies until evenly distributed throughout the dough.
Scoop the dough using a tablespoon and place rounds on the prepared baking sheets about 2 inches apart.
Bake in the preheated oven for 10-12 minutes, or until the edges are set but the centers are still soft.
Let cookies cool on the baking sheet for 5 minutes before transferring to wire racks.
Once cooled, spread cream cheese frosting on the bottom of one cookie and sandwich with another.
Enjoy your homemade Red Velvet Oreo Cookies fresh or store them in an airtight container.