Chewy Chocolate-Peanut Butter Marshmallow Bars

Looking at this bar from the outside, you could easily go, “ehh, I’ll pass,” and think it was a healthy chocolate oatmeal bar. But if you would taste it, you would discover a layer of crunchy rice crispies in silky chocolate combined with peanut butter, made even better by gooey marshmallows, then finished off with a fudgy brownie base. This is a dessert that everyone will fall in love with, but what’s not to like? It has all the right textures, making it irresistible, PERFECT for chocolate lovers or a crowd, and it’s not overly sweet!

This dessert is also really simple to make and can chill for hours in the fridge.

I don’t drink plain coffee, but I tasted it with these, and now I totally know why the whole world is obsessed with coffee and chocolate.

 

Chewy Chocolate-Peanut Butter Marshmallow Bars

These bars are texture heaven. They're gooey and chewy, with rice crispies enveloped in chocolate.
Servings 24 bars

Ingredients

Brownie Base:

  • 1/2 cup butter softened
  • 2/3 cup granulated sugar
  • 1 tsp. vanilla
  • 2 eggs
  • 3/4 cup all-purpose flour
  • 2 Tbsp cocoa powder
  • 1/4 tsp baking powder
  • 1/4 tsp salt
  • 1/2 cup chopped pecans optional

Marshmallow Layer:

  • 2 cups mini marshmallows
  • *or* about 3 cups regular marshmallows enough to cover the brownie layer

Chocolate Rice Crispie Layer:

  • 1 cup milk-chocolate or semi-sweet chocolate chips
  • 2 Tbsp butter
  • 3/4 cup creamy peanut butter
  • 2 cups rice crispies

Instructions

  • Preheat oven to 350 degrees F and grease a 9x13 glass baking dish.
  • In a mixing bowl, cream together butter and sugar until fluffy. Add eggs and vanilla and mix until combined. The mixture will look curdled, but will become smooth and well-mixed once flour is added.
  • In a small bowl, whisk together flour, cocoa powder, baking powder, and salt. Add to creamed mixture and mix until combined. Fold in chopped pecans, if using. Batter will be thick.
  • Spread batter in prepared baking dish and bake for 15 min or until a toothpick inserted in the center comes out with a few moist crumbs. It's OK if the brownies look a bit underbaked, because they will continue to cook, and result in a fudgy brownie.
  • Sprinkle marshmallows evenly over the top. If using large marshmallows, rip them in half. Return the brownies to the oven and broil for 3 min or until marshmallows are puffy, lightly browned, and spread together. Don't go anywhere while marshmallows are browning, because it happens quickly.
  • Cool.*
  • In a saucepan, combine chocolate chips, butter, and peanut butter. Cook and stir over LOW heat just until melted, and remove from heat.
  • Fold in rice crispies and spread evenly over cooled marshmallows. Sprinkle with sea salt, if desired.
  • Chill bars until set, then slice and serve.

Notes

*If you don't allow the marshmallows to cool, the chocolate topping will sink into the still-warm marshmallows, and you won't be able to spread them. (This happened to me and I had to make more topping).
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David Stahl
David Stahl
6 years ago

That’s awesome dear! Keep it up.

Lisa Elis
Lisa Elis
6 years ago

HEEEYYY look who returned to blogging!! your photography is so good! and these look so delicious!! <3

Jewel Decker
Jewel Decker
5 years ago
Reply to  Lisa Elis

These bars are so good! We had guests over for dinner and needed a quick, easy, but delicious dessert to make, and these were perfect! Everyone loved them (*shhh* don’t tell anyone I used brownie mix for the bottom layer! I was pressed for time, so that was a shortcut 🙈)

Julia Hofer
Julia Hofer
6 years ago

They look so good!! I need to go make some😉😋

Serene Hofer
Serene Hofer
5 years ago

I’ve made them a couple times all ready and they always turn out perfect!!! they taste sooo good! where did you get the recipe?

Serene Hofer
Serene Hofer
5 years ago

but, I checked out her blog and couldn’t find the recipe anywhere….

Karen Stahl
Karen Stahl
5 years ago

I’m a chocolate/peanut butter kinda girl and these are a favorite! 😊

Lisa
Lisa
3 years ago

Making these for the colony tomorrow! Looking forward to trying them😋