Using a hand mixer, or a stand mixer, whip softened butter, granulated sugar and brown sugar until light and fluffy.
Add egg, vanilla, and red food coloring.
In a small bowl, whisk together flour, cocoa, baking soda, and salt. Add to whipped mixture, and blend.
Add semi sweet chocolate chips, and ¼ cup of the white chocolate chips.
Using a heaping 1 Tablespoon cookie scoop, drop dough onto baking sheet. Form into balls, press a few white chocolate chips into the top for decoration*.
Bake for 10 minutes. Remove from oven and cool for 2 minutes on baking sheet before removing to baking rack to cool completely.
Notes
*Alternately, press white chocolate chips onto warm baked cookies.