Slumber Party Cookie Pizza

In mixing bowl, cream butter, peanut butter and sugars.
Beat in Egg.
Combine flour, baking soda and salt.
Stir into mixture.
Stir in chocolate chips.
Pat dough into greased 14" pizza pan.
Bake 350 20-25 minutes or until golden brown.
Cool.
Spread frosting to within one inch of edge.
Decorate
Enjoy