This is the recipe I use....honestly it makes the BEST cookies in the world.
Preheat oven to 375F
1 tsp salt
1 tsp baking soda
2 cups all-purpose flour
1 cup brown sugar
1/2 cup granulated sugar
1-1/2 cups semi-sweet chocolate chips
1 cup unsalted butter or margarine
1 large egg
1 tsp vanilla
Mix dry ingredients together. Beat butter in a medium bowl until creamy. Beat sifted ingredients into butter until blended. In a small bowl, beat egg with vanilla. Mix beaten egg mixture into butter mixture until blended. Stir in chocolate chips. Drop teaspoonfuls of batter, spaced well apart, onto a greased cookie sheet. Bake 8 minutes or until lightly browned.