Nestle’s Toll-House Cookies

1 ½ cups butter                                   4 cups flour
1 ½ cups sugar                                    2 teaspoons salt
¾ cup brown sugar                              1 ½ teaspoons soda
3 eggs                                                  1 tablespoon vanilla
Chocolate chips

Blend butter, sugars, eggs, and vanilla.  Add dry ingredients.  Bake at 375 for 8 to 10 minutes on ungreased cookie sheet.