Combine first 5 ingredients in a mixing bowl; beat with a mixer at medium speed until combined. Lightly spoon flour into dry measuring cups; level with a knife. Stir in flour.
Press mixture into a 13 x 9-inch pan coated with cooking spray.
Spread marshmallow creme over dough.
Sprinkle evenly with peanuts and chocolate chips.
Bake at 350 for 20 to 22 minutes or until lightly browned. Cool completely.