Preheat oven to 375 degrees F. Grease bottom of 12-inch pizza pan or 13 x 9-inch baking pan.
Press or spread cookie dough evenly into prepared pan. Bake for 11 to 15 minutes or until edge is set and center is still slightly soft. Immediately sprinkle morsels over hot crust; drop peanut butter by spoonfuls onto morsels. Let stand for 5 minutes or until morsels are shiny. Gently spread chocolate and peanut butter evenly over cookie crust.
Sprinkle candy in single layer over pizza. Cut into wedges; serve warm or at room temperature.