Chocolate Chip Butter Cookies

This recipe came from a cookbook that I don't have anymore. I don't know which one.

1 pound butter, softened (do not use margarine)
2 cups shifted powdered sugar
.5 teaspoon salt
2 teaspoon vanilla
4.5 cups flour
12 oz pkg semi sweet chocolate chips (mini-chips work well)

In mixer, cream butter and 2 cups powdered sugar until fluffy. Add salt, vanilla and flour until blended. Mixture will be stiff. Stir in chips and blend well. Pinch off pieces of dough and roll into 1-inch balls. Place on cookie sheet and flatten with a fork. Bake at 350 degrees for 15-20 minutes (20 minutes when using an insulated cookie sheet.) Sprinkle with aditional powdered sugar while hot.

Top: Owen O'Malley