1 pkg (17.5-oz) double chocolate chunk cookie mix
1/4 cup canola oil
2 tbsp water
1 cup chocolate fudge frosting (from a tub)
1/3 cup miniature marshmallows
1 tbsp chopped peanuts
Preheat oven to 350 degrees.
In a mixing bowl, combine the cookie mix, oil, water, and egg with a large spoon or spatula until it forms a dough. Press mixture into an ungreased 8-inch square baking pan.
Bake at 350 degrees for 20 to 25 minutes, just until set. Do not overbake. Allow to cool completely.
Mix the frosting and marshmallows together; spread over the cooled bars. Sprinkle the peanuts over the top.