In a small bowl combine flour, baking soda and salt. I usually start with 2 cups flour then add the other 1/4 cup as needed to make my dough stiffer so I will not have flat cookies.
In a large mixing bowl, cream together butter and sugars until light and fluffy. Then beat in egg and vanilla.
Gradually blend in flour mixture. Stir in chocolate chips.
Drop by a heaping tablespoon or small scoop onto a cooking sheet lined with a silicone mat or parchment paper.
Bake in a 375-degree oven for 8 to 10 minutes or until barely brown and slightly gooey looking in the center.
Cool 3 minuets before placing them on a wire rack. Store in a tightly covered conainer.
Notes
I make large cookies and it yields about 16 cookies. If you make smaller cookies check them at 7 minutes and if they look slightly gooey on top i would remove them from the oven and let them cool.