Peanut Butter Marshmallow Brownies: Indulgence Made Easy

Karly Campbell | Buns in my Oven

Kick those brownies up a notch! Add silky peanut butter and creamy marshmallow for a super indulgent treat.

Peanut Butter Chocolate Brownies Photo
You know what my favorite thing about a box of brownie mix is? The possibilities. 
I mean, sure. You could make some plain old brownies with that box of mix. Or you could add every possible good thing in life to that box of brownie mix and create something magical. (Sort of like I did with these Cadbury Creme Egg Brownies!)
Peanut Butter Chocolate Brownies Picture
This time around, I topped my brownies with plenty of chocolate chips and mini marshmallows. Then I went all crazy and created an easy peanut butter sauce to drizzle daintily over the top. And, okay, whatever. There was nothing dainty about it. I basically just dumped on as much sauce as possible and then buried my face in the pan of gooey goodness. 

Peanut Butter Chocolate Brownies Recipe

    12 Servings


  • 1 box Brownie Mix
  • 1 cup Milk Chocolate Chips, (I used milk)
  • 1 cup Miniature Marshmallows
  • 1/4 cup Crunchy Peanut Butter
  • 1/4 cup Caramel Topping


  1. Prepare the brownie mix according to package instructions. Bake as directed. Five minutes before brownies are finished baking, remove from the oven. 
  2. Top with the chocolate chips and marshmallows. Return to the oven to finish baking.
  3. While the brownies are baking for the last five minutes, add the peanut butter and caramel to a microwave safe bowl. Microwave for 1-2 minutes, stirring every 30 seconds, until the peanut butter has melted into the caramel sauce. Stir well.
  4. Drizzle the peanut butter sauce over the baked brownies. Cool completely before cutting and serving. 
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Karly Campbell

About Karly

Karly cracks us up on her blog Buns in My Oven, and quite regularly stuns with all kinds of recipes. You'll find her passion for baking, especially Bar Desserts and casseroles, here on Food Fanatic.