Preheat and prepare pans. Preheat oven to 350oF. Line baking sheets with parchment paper or silicone baking mat.
Combine dry ingredients. Whisk flour, cocoa powder, baking soda, baking powder, and salt together in a bowl.
Cream butter and sugar. Beat butter with an electric mixer until fluffy, about 2 minutes; beat in brown sugar and white sugar until smooth, about 1-2 minutes.
Add remaining wet ingredients. Beat egg, milk, and vanilla extract into butter mixture; beat in food coloring until uniformly colored.
Add dry ingredients. Stir flour mixture into butter mixture gradually with electric mixer on low speed until combined; stir in 1 cup chocolate chips.
Scoop the cookies. Using a 1-inch cookie scoop, or tablespoon, scoop the cookies into 1 ½-inch balls onto prepared cookie sheets about 2 inches apart. Roll dough into 2-inch balls; place on prepared baking sheets and flatten slightly.
Bake and cool cookies. Bake in preheated oven until edges are lightly browned, about 10 minutes. Cool cookies on the cookie sheet for 5 minutes, then transfer to a cooling rack to continue cooling.