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Toasted Marshmallow Peanut Butter Cake Bars

These Toasted Marshmallow Peanut Butter Cake Bars are chewy, sweet and packed with all kinds of peanut butter cookie goodness! They’re some of our favorite cookie bars ever!

Marshmallow & Peanut Butter Cake Cookie Bars

Girl Scout Season is here! Yay for my taste buds but boo for my waistline because that means I am adding Girl Scout Cookies to everything including my new Toasted Marshmallow Peanut Butter Cake Bars. Let me paint the picture for you. Imagine sinking your teeth into an ultra chewy cake-y cookie like consistency-half way between a rice krispie treat and blondie. The toasted marshmallows mixed right into the dough give the best texture and not to mention rich taste.

Try my Thin Mint Double Chocolate Chip Cookies too! Follow Picky Palate on Instagram for daily recipe inspiration.

Here’s your ingredients. Nice and simple.

How to Roast Marshmallows in The Oven

  1. Preheat oven to 400 degrees F. then back to 350 for bars and line 2 large baking sheets with a silpat liner or parchment paper. I used the half sheet size.
  2. Place marshmallows into the center of your baking sheet and bake for about 10 minutes until nice and golden on the tops and puffed. Remove and reduce oven’s temperature to 350.

How To Make Peanut Butter Cake Bars

  1. Preheat oven to 350 degrees F. Place cake mix, butter, oil, egg, chocolate chips and quartered Tagalongs into a large mixing bowl. Stir to combine. Stir in toasted marshmallows, only stir to combine gently, you don’t want to mix too much. Transfer dough to prepared baking sheet and press evenly, don’t spread to edges, just within the border is fine.
  2. Bake for 18-22 minutes, until baked through. Remove and let cook for 30 minutes before slicing into squares. Serve and Enjoy!

Add your egg, a little oil and of course the peanut butter!

Time to add the toasted marshmallows. Be prepared, it’s a sticky delicious mess. Just scoop it up the best you can with a spoon.

 Add it right to your bowl.

Give a gentle stir.

 Girl Scout Cookies! I used the peanut butter patties aka Tagalongs.

Quarter those babies and add them right to the bowl.

Oh yah!

Transfer to your prepared baking sheet and press evenly.

 Bake and get ready to nom nom nom 🙂

Perfect little chewy squares.

Careful these babies go fast.

Toasted Marshmallow Peanut Butter Cake Bars

These Toasted Marshmallow Peanut Butter Cake Bars are chewy, sweet and packed with all kinds of peanut butter cookie goodness! They're some of our favorite cookie bars ever!
Course: Dessert
Cuisine: American
Prep Time 10 mins
Cook Time 22 mins
Total Time 32 mins
Servings: 16 bars
Calories: 357kcal
Author: Jenny
Cost: 8
Print Pin

Equipment

  • Oven

Ingredients

  • 6 Jumbo marshmallows
  • 1 box yellow cake mix
  • 1 stick/1/2 cup unsalted softened butter
  • 2 tablespoons vegetable or canola oil
  • 1 large egg
  • 1/2 cup creamy peanut butter
  • 1 1/2 cups chocolate chips I used mini
  • 10 Girl Scout Tagalongs quartered (peanut butter patties)

Instructions

  • Preheat oven to 400 degrees then back to 350 for bars and line 2 large baking sheets with a silpat liner or parchment paper. I used the half sheet size.
  • Place marshmallows into the center of your baking sheet and bake for about 10 minutes until nice and golden on the tops and puffed. Remove and reduce oven’s temperature to 350.
  • Place cake mix, butter, oil, egg, chocolate chips and quartered Tagalongs into a large mixing bowl. Stir to combine. Stir in toasted marshmallows, only stir to combine gently, you don’t want to mix too much. Transfer dough to prepared baking sheet and press evenly, don’t spread to edges, just within the border is fine. Bake for 18-22 minutes, until baked through. Remove and let cook for 30 minutes before slicing into squares. Serve and Enjoy!

Notes

You can substitute chopped Reese's Peanut Butter Cups in place of the Tagalong Cookies if desired.

Nutrition

Calories: 357kcal | Carbohydrates: 54g | Protein: 6g | Fat: 14g | Saturated Fat: 5g | Cholesterol: 14mg | Sodium: 333mg | Potassium: 108mg | Fiber: 2g | Sugar: 36g | Vitamin A: 59IU | Vitamin C: 1mg | Calcium: 101mg | Iron: 1mg
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