Marshmallow Cookie Bars

1 18-oz. pkg. Pillsbury refrigerated sugar cookie dough
4 C mini marshmallows
3/4 C candy-coated chocolate pieces
1/4 C hot fudge ice cream topping, warmed

Heat oven to 350 degrees. Press cookie dough in bottom of ungreased 13x9 inch pan. Bake for 10-12 minutes or until golden brown. Remove pan from oven and sprinkle even with marshmallows. Return to oven and bake an additional 1-2 minutes or until puffy. Remove pan and sprinkle with chocolate pieces and drizzle with warm ice cream topping. Cool 1 hour and cut into bars.