Peanut Butter Cookie S’mores Bars

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Quick to whip up and ridiculously delicious, these bars are a sweet tooth’s dream come true. Perfect for any occasion or just satisfying your daily sugar cravings, these bars are a delightful fusion of peanut butter cookie goodness, gooey marshmallow fluff, and decadent chocolate chips. You won’t believe how easy it is to make magic happen in your kitchen!

Why You’ll Love Peanut Butter Cookie S’mores Bars

  • Easy Peasy Baking: Baking can be intimidating, but fear not! These bars are a breeze to make, even for baking beginners. With simple steps and minimal ingredients, you’ll have a batch of heavenly bars in no time.
  • Irresistibly Delicious: Picture this: a layer of peanut butter cookie, a gooey marshmallow middle, and a crown of chocolate chips – need I say more? These bars are a symphony of flavors that will leave your taste buds singing in sweet harmony.
  • Sweet Tooth Satisfaction: If you have a relentless sweet tooth, these bars are here to satisfy your cravings. The perfect combination of sweetness from the peanut butter cookie, marshmallow fluff, and chocolate chips ensures your sugar hankerings are completely appeased.
  • Versatile for Any Occasion: Whether it’s a family gathering, a potluck, or just a cozy night in, these bars are versatile and fit any occasion. They’re like the chameleons of the dessert world – adaptable and always a crowd-pleaser.
  • Memories of S’mores, Anytime: Remember the joy of toasting marshmallows by the campfire for classic s’mores? These bars bring that nostalgic delight to your kitchen without the need for a campfire. It’s like a warm, comforting hug in dessert form.

What You Need To Make Peanut Butter Cookie S’mores Bars

  • Measuring Cups/Spoons
  • Mixing bowl
  • Electric mixer
  • Baking dish
  • Parchment paper
  • Cookie sheets

Ingredients You Need To Make Peanut Butter Cookie S’mores Bars

  • GF flour
  • Brown sugar
  • Sugar
  • Kosher salt
  • Baking soda
  • Baking powder
  • Creamy or crunchy peanut butter
  • Vanilla extract
  • Butter
  • Egg
  • Marshmallow fluff
  • Chocolate chips

Substitutions + Alternatives

Can I use All-Purpose Flour?

Yes, All-Purpose Flour can be used. Use the same amount that is listed in the ingredients, but swap with all purpose.

How To Make Peanut Butter Cookie S’mores Bars

  1. Set your oven to 350 degrees and line two cookie sheets with parchment paper.
  2. In a mixing bowl, blend room temperature butter, brown sugar, and sugar for a solid 5 minutes. You want it to be light and fluffy.
  3. Toss in the egg, vanilla, and peanut butter into the mix. It’s like building a flavor dream team in your bowl!
  4. Now, introduce the dry ingredients – flour, kosher salt, baking soda, and baking powder. Mix it up just until everything plays nice together.
  5. Press half of that glorious cookie dough into the base of your baking dish. This is the foundation for your soon-to-be masterpiece.

6. Spread a generous layer of marshmallow fluff over the pressed dough, sprinkle some chocolate chips (because why not?), and top it all off with the remaining cookie dough.

7. Pop it in the oven and let the magic happen for 30-35 minutes. You’ll know it’s done when the top is a beautiful golden brown and the center has just a little wobble.

8. Take it out, let it cool, and then dive into dessert heaven! Pro tip: maybe cut it into bars before diving – it’s a bit more civilized.

Commonly Asked Questions

Can I use chunky peanut butter instead of creamy? 

Absolutely! The choice between creamy and chunky is all about personal preference. Chunky peanut butter can add an extra layer of texture to these bars.

How do I store these bars? 

Pop any leftovers (if there are any) into an airtight container and store them at room temperature. They also freeze well if you want to save some for later.

Can I add nuts to the recipe? 

Absolutely! If you’re a nut enthusiast, throw in your favorite nuts for an extra crunch. Pecans or almonds would be fantastic choices.

Peanut Butter Cookie S’mores Bars

These bars combined my favorite flavors! They come together quickly and are seriously so good!
Print Pin Rate
Course: Dessert
Cuisine: American
Keyword: Peanut Butter Cookie S’mores Bars
Prep Time: 15 minutes
Cook Time: 35 minutes
Cool Time: 5 minutes
Servings: 12 bars
Calories: 364kcal



  • 1 cup 1.1 GF flour
  • ½ cup brown sugar
  • cup sugar
  • ¾ tsp kosher salt
  • ¾ tsp baking soda
  • ½ tsp baking powder
  • ¾ cup creamy or crunchy peanut butter
  • 2 tsp vanilla extract
  • 8 tbsp butter room temperature
  • 1 egg
  • 4 oz marshmallow fluff
  • 1 cup @eschocolate chocolate chips


  • Preheat the oven: Set it to 350 degrees. Line two cookie sheets with parchment paper.
  • Prepare Dough: In a mixing bowl, combine room temperature butter, brown sugar, and sugar. Mix on high for 5 minutes.
  • Add Wet Ingredients: Integrate the egg, vanilla, and peanut butter into the mixture.
  • Incorporate Dry Ingredients: Add the dry ingredients (flour, kosher salt, baking soda, and baking powder). Mix until just incorporated.
  • Assemble Base: Press half of the cookie dough into the base of the baking dish.
  • Layer Marshmallow Fluff and Chocolate Chips: Spread marshmallow fluff over the pressed dough, sprinkle 1/4 cup of chocolate chips, and top with the remaining cookie dough.
  • Bake:  Bake for 30-35 minutes until the top is golden brown, and the center jiggles just a little.
  • Cool and Enjoy: Remove from the oven, let it cool, and enjoy!


Serving: 1bar | Calories: 364kcal | Carbohydrates: 43g | Protein: 5g | Fat: 21g | Saturated Fat: 9g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 6g | Trans Fat: 0.3g | Cholesterol: 34mg | Sodium: 368mg | Potassium: 154mg | Fiber: 2g | Sugar: 31g | Vitamin A: 253IU | Calcium: 47mg | Iron: 1mg
Tried this recipe?Mention @TheSaltyCooker or tag #thesaltycooker!

These bars are your ticket to a simple yet heavenly dessert experience. They’re easy to make, contain the perfect combo of peanut butter, marshmallow, and chocolate, and are super adaptable for any occasion! Not only will you love the taste, but the memories of classic s’mores will flood back, making each bite a nostalgic journey.

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