Preheat oven to 350°F. Line baking sheets with parchment paper.

In a medium bowl, whisk together the flour, cocoa powder, baking soda, and salt.

In a large bowl, beat the softened butter and granulated sugar until creamy.

Beat in the egg, then mix in vanilla extract and red food coloring until combined.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Fold in the white chocolate chips.

Drop tablespoon-sized balls of dough onto the prepared baking sheets, spacing them about 2 inches apart.

Bake for 10–12 minutes or until the edges are set. Allow cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.