Reminds me of one of my favorite candy bars!
Ingredients
- 1 pouch (1 lb 1.5 oz) Betty Crocker™ peanut butter cookie mix
 
- 3 tablespoons vegetable oil
 
- 1 tablespoon water
 
- 1 egg
 
- 3 cups miniature marshmallows
 
- 2/3 cup light corn syrup
 
- 1/4 cup butter or margarine
 
- 2 teaspoons vanilla
 
- 1 bag (10 oz) peanut butter chips
 
- 2 cups crisp rice cereal
 
- 2 cups salted peanuts
 
Directions
Heat oven to 350°F. 
Spray the bottom of pan (13x9-inch) with cooking spray.
Stir cookie mix, oil, water and egg until soft dough forms in a large bowl. 
With floured fingers, press dough in pan using.
Bake 12 to 15 minutes or until set.
Sprinkle marshmallows over crust immediately.  Bake 1 to 2 minutes longer, until marshmallows begin to puff up.
Cook corn syrup, butter, vanilla and chips over low heat in 4-quart saucepan stirring constantly until chips are melted. 
Remove from heat; stir in cereal and nuts. Immediately spoon cereal mixture evenly over marshmallows. 
Refrigerate 30 minutes or until firm. 
For bars, cut into 9 rows by 4 rows.
Expert Tips from Betty Crocker
Skip the cooking spray and line pan with foil for quick cleanup and easy bar removal.
For a different flavor, try milk chocolate or semisweet chocolate chips for the peanut butter chips.
Source