Combine flour, cocoa powder, baking soda, and salt. Set aside.
In a large bowl, cream butter, brown sugar, and granulated sugar until smooth using a hand mixer on medium speed. Add egg, cream cheese, milk, vanilla, and food colouring. Blend until combined.
Slowly add dry ingredients, blending until combined. Then fold in white chocolate chips.
Using 2 tablespoons of dough for each cookie, arrange about 9 cookies on the Ninja® Oven Tray.
Install the wire rack on Level 3. Select BAKE, set temperature to 175°C, and set time to 20 minutes. Press START/STOP to begin preheating.
When the unit has preheated, place tray on wire rack on Level 3. Close oven door to begin cooking. Cook for 9 to 10 minutes.
