Preheat oven to 350°F.

Mix together 2 cups flour, 1 tsp baking soda, 1/2 tsp salt. Set aside.

Soften 1 cup margarine. Add 2/3 cup brown sugar and 2/3 cup white sugar and stir until creamy. Mix in 1 egg and 1 tsp vanilla, then flour mixture, then 1 cup chocolate chips.

Roll teaspoonfuls of dough into balls. Place on cookie sheet. Flatten.

Bake for 7-8 minutes.