Flourless Peanut Butter Cookies

1 cup creamy peanut butter

1 cup sugar

1 egg

1 tsp vanilla

1 cup chocolate chips

Cream peanut butter and sugar until light and fluffy.  Stir in egg, vanilla, and chocolate chips.  Drop by heaping teaspoon 2 inches apart onto a lightly greased cookie sheet.  Flatten cookies slightly with a fork.  Bake 350 degrees for 15 to 20 minutes or until set.  Remove to wire rack to cool.  Makes 3 dozen.