1 Preheat oven to 375ºF.
2 In a large mixing bowl, beat the margarine, sugar, and brown sugar until creamy. Add the egg, and beat well.
3 In another bowl, mix the flour and baking soda. Add the flour mixture to the margarine mixture, and beat just until it is blended.
4 Add the vanilla, and stir in the chocolate chips.
5 Drop spoonfuls of dough onto a baking sheet coated with nonstick cooking spray.
6 Bake for 8 to 10 minutes, or until cookies are lightly browned.
7 Remove from the cookie sheet and cool completely on a wire rack before serving.