Deluxe Baked Marshmallow Peanut Butter Rice Krispies Squares Bar

Total Time
Prep 25 mins
Cook 18 mins

A chocolate cake bottom topped with a chocolate, peanut butter rice cereal topping, and a gooey marshmallow filling. Prep time includes making the peanut butter topping. this can also be made successfully in a 13x9-inch baking pan, in fact I make it all the time in that size pan, and the rice cereal/peanut butter mixture can be doubled if desired.

Ingredients Nutrition


  1. Set oven to 350°F.
  2. Grease a jelly roll pan.
  3. In a mixing bowl, cream 3/4 cup butter and sugar for about 3-4 minutes.
  4. Add in eggs and vanilla; beat for another 2 minutes.
  5. In a bowl sift together flour, baking powder, salt and cocoa; add to the creamed mixture; stir until well combined.
  6. Add/mix in nuts (if using).
  7. Spread in a greased jelly roll pan.
  8. Bake for 15-18 minutes.
  9. Remove from oven, and sprinkle marshmallows evenly over the cake; return to oven for 2-3 minutes.
  10. Using a knife dipped in water, spread the hot marshmallows evenly over the cake; cool.
  11. For the topping: combine chocolate chips, 3 tablespoons butter and peanut butter in a small saucepan or in the microwave.
  12. Cook over low heat, stirring constantly until well blended and smooth.
  13. Remove from heat, stir in the rice cereal.
  14. Dollop mixture over the bars (don't worry about completely covering the marshmallows).
  15. Chill and cut into squares.
Most Helpful

First of all... I cheated and used a box cake mix (chocolate). I baked it in a 11 X 17 pan and it turned out great! Those marshmallows are a bugger to spread though. Thanks for another great recipe. I think I'll make this for our 4th of July picnic.

luvmybge June 27, 2005

WOW! These were so good and easy to make. My daughter loved them and said, "these are so good and very unusual."

Luv2cook February 22, 2015

O.K....after starting to make these I realized I have a recipe posted similar. Chocolate Marshmallow Cream Bars. There are a few minor differences in ingredients, but the end result is the very same. I made these to put on a Thanksgiving goodie tray to bring to a family gathering. A sure winner!!! Made for 123Hits'~

CoffeeB November 26, 2008