Step 1

In a small bowl, stir together flour and baking soda; set aside.

Step 2

In a medium saucepan, over medium-low heat, melt margarine; remove from heat. Stir in brown sugar, cocoa powder, egg, milk and vanilla. Add flour mixture; stir until just combined. Place in bowl; cover and chill dough 10 minutes. Stir in chips.

Step 3

Preheat oven to 350 degrees F. Lightly coat baking sheets with cooking spray.

Step 4

Drop chilled dough by cookie scoop or rounded teaspoons onto baking sheets. Bake 8 to 10 minutes or until edges are set. Cool on baking sheets for 5 minutes. Transfer to a wire rack and cool completely.