Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone mat.
In a bowl, whisk together flour, cocoa powder, baking soda, and salt.
In a large mixing bowl, beat butter, granulated sugar, and brown sugar until creamy.
Add the egg and vanilla extract to the butter mixture. Mix well.
Stir in red food coloring until evenly distributed.
Gradually add dry ingredients to the wet ingredients, mixing until just combined. Do not overmix.
Fold in white and semisweet chocolate chips.
Scoop tablespoon-sized dough balls onto the prepared baking sheet, leaving some space between each.
Bake for 10-12 minutes, or until the edges are set and the centers are soft.
Allow the cookies to cool on the baking sheet for a few minutes, then transfer to a wire rack.