In a medium bowl, whisk together the flour, cocoa powder, baking soda, and salt until well combined.
In a separate large bowl, cream the softened butter, granulated sugar, and brown sugar together until light and fluffy.
Add the vanilla extract, milk, and red food coloring to the butter mixture, mixing until fully incorporated.
Gradually add the dry ingredients to the wet ingredients, stirring until combined.
Fold in the mini chocolate chips.
If the dough is too dry, add a little more milk, one teaspoon at a time, until desired consistency is reached.
Chill the dough in the refrigerator for about 30 minutes for a firmer texture, if desired.