Decadent (& Easy) Peanut Butter Rice Krispie Brownies

Disclosure Statement
I mentioned in my Sukkot menu plan post yesterday that I was going to make Peanut Butter Rice Krispie Duncan Hines’ Brownies for dessert.

Many of you asked for the recipe, which I am more than happy to share. I had actually intended to make them today, so that I could share a mouth-watering picture with you, but the day got away from me.

I will update this post with pics just as soon as I can, but for now, I am going to go ahead and share the recipe with you in case you want to make it for yomtov and need to buy the ingredients.

(This is how you know I’m SO not a food blogger… no picture is like unthinkable!)

Decadent (& Easy) Peanut Butter Rice Krispie Brownies


1 box of Duncan Hines Brownies

1 large container of Marshmallow Fluff

3/4 cup of chocolate chips

3/4 cup of peanut butter (I think smooth PB is better than chunky in this recipe, but it’s personal preference)

3-4 cups of Rice Krispies


Bake the brownies per the box instructions in a 9×13 pan.

Remove from oven and cool for 10-15 minutes.

Add the chocolate chips and peanut butter to a glass bowl and microwave together in 30-second increments until melted, stirring after each time. Fold the Rice Krispies into the mixture with a spatula (I spray my spatula with Pam first to avoid over-sticking).

Spread the container of Marshmallow Fluff over the brownies. Then spread the Rice Krispies mixture on top of the Fluff. Use that Pam-sprayed spatula to make it a bit easier.

Cover the brownies with plastic wrap and refrigerate until ready to serve.



  1. Oooo. This sounds delightful!! Thank you for sharing!

  2. I used to make something similar. The cookbook I got it from (a fundraiser cookbook from a shul) called them Mississippi Mud Brownies. Not sure if the name fits, though.

    • Agree – mud seems to imply runny, no?

      • To me mud suggests something thick, not runny. When I googled that recipe name, it appeared to be a similar recipe, but without the peanut butter.

        That said, I would still want to come up a better name for it, because however one thinks of mud, I personally never connect it to chocolate!

  3. Sadie Brenner says

    Thanks for sharing. Can’t wait to make this.

  4. Beverly Sonnenblick says

    the fluff – the big 16 oz plastic container?

  5. It’s called Mississippi Mud.

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