Peanut Butter S’mores Blondies

Recipe By Tessa Arias
September 5th, 2014
4.34 from 6 votes
4.34 from 6 votes

Peanut Butter S'mores Blondies have a layer of graham cracker, Hershey's chocolate bars, and marshmallow fluff stuffed between two layers of chewy peanut butter butterscotch blondies.

Yield: 16 blondies

Prep Time: 15 minutes

Cook: 30 minutes

Tessa's Recipe Rundown...

Taste: Signature s’mores flavor that we all know and love, with the marvelous addition of butterscotch and peanut butter flavors.
Texture: The texture is indescribably awesome. Chewy, ooey, gooey, crunchy goodness.
Ease: Easy stuff!
Appearance: Messy but oh so mouthwatering.
Pros: Amazing twist on s’mores that everyone will love.
Cons: Sugar overload!
Would I make this again? Absolutely.

As a chef, recipe developer, or food blogger, you always look out for certain reactions when people taste your food. Everyone always tries to be nice and polite, of course, but you can’t fake the enthusiasm, surprise, and joy people naturally express when they eat something they absolutely adore.

Peanut Butter S'mores Blondies - my boyfriend called this his FAVORITE dessert!

I’m excited to report that’s exactly the reaction that occurred when Jared and I took our first bites into these Peanut Butter S’mores Blondies. The idea for these blondies came from an intense craving I had for s’mores. I wanted to make some sort of s’mores goodie, and I wanted it to be relatively quick and easy in a bar form. I had the idea to stuff s’mores fix-ins between two layers of blondie dough, but wasn’t sure if it would work out. After just a bite Jared literally said, “This is one of the best things you’ve ever made.”

Peanut Butter S'mores Blondies

That is music to my ears! I knew I had to share this recipe with you guys ASAP, if you’ve got any s’mores lovers or peanut butter lovers in the family they will adore these Peanut Butter S’mores Blondies. The blondie itself is so beautifully chewy with a perfect balance of sweet butterscotch and nutty peanut butter flavors. That combined with the sticky, gooey, and crunchy s’mores filling is to die for.

Peanut Butter S'mores Blondies - my boyfriend called this his FAVORITE dessert!

The bars are a little messy, but in the best possible way. To get cleaner cuts, refrigerate the bars before cutting. You can microwave them to get that wonderfully gooey middle.

4.34 from 6 votes

How to make
Peanut Butter S'mores Blondies

Yield: 16 blondies
Prep Time: 15 minutes
Cook Time: 30 minutes
Inactive Time 15 minutes
Total Time: 1 hour
Peanut Butter S'mores Blondies have a layer of graham cracker, Hershey's chocolate bars, and marshmallow fluff stuffed between two layers of chewy peanut butter butterscotch blondies.


  • 1 stick (4 ounces) unsalted butter
  • 2 cups (14 ounces) brown sugar, preferably dark brown
  • 1/2 cup (4.8 ounces) peanut butter
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 2 1/2 cups (11.25 ounces) all purpose flour
  • 1 teaspoon baking powder
  • 1/4 teaspoon baking soda
  • 1/2 teaspoon salt
  • 2 XL-sized Hershey’s milk chocolate bars
  • 1 1/2 cups (7 1/2-ounce jar) marshmallow crème
  • 4-5 whole graham crackers


  1. 1. Preheat the oven to 350°F. Line an 8x8-inch pan with foil, leaving an overhang on all sides, then spray with nonstick baking spray.
  2. 2. In a saucepan over medium heat, melt the butter and brown sugar, stirring constantly until smooth. Remove from the heat, and stir in the peanut butter. Allow to cool while combining the flour, baking powder, baking soda and salt in a large mixing bowl.
  3. 3. Add the eggs to the cooled peanut butter mixture, one at a time, mixing well after each addition. Add the vanilla extract and stir to combine. Pour the mixture into the prepared dry ingredients, and stir to create a thick, smooth batter.
  4. 4. Divide the dough in half and press half into the prepared pan, spreading evenly to the edges of the pan. Place the graham crackers then the chocolate bars over the dough. Spread the marshmallow crème evenly over the chocolate.
  5. Scoop out balls of the remaining dough and flatten completely. Top the marshmallow crème evenly with the flatten dough to cover completely.
  6. 5. Bake for 30-35 minutes until the top is golden and the edges are slightly browned. Allow to cool in the pan. Cut into 1-2 inch squares and serve.
Course: Dessert
Cuisine: American

Tessa Arias

About Tessa...

I share trusted baking recipes your friends will LOVE alongside insights into the science of sweets. I'm a professionally trained chef, cookbook author, and cookie queen. I love to write about all things sweet, carb-y, and homemade. I live in Phoenix, Arizona (hence the blog name!)

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Recipe Rating

  1. #
    Chelsea @chelseasmessyapron — September 5, 2014 at 5:21 am

    I just about died seeing your email in my inbox this morning – these have got to be the prettiest and most decadent looking s’mores bars ever!! Love that there is peanut butter and a Blondie base – can’t wait to try these! Pinned 🙂

  2. #
    Kelly @ Trial and Eater — September 5, 2014 at 6:38 am

    These look to-die-for! I just love when a recipe works out well and you get a great reaction from your taste testers 🙂

  3. #
    Cathy Perez — September 5, 2014 at 9:25 am

    These looks yummy, I’ve got to try this Pinned!

  4. #
    Vedika @ Hot Chocolate Hits — September 5, 2014 at 9:31 am

    These are mouthwatering. I hope there’s a Youtube video coming out!

  5. #
    kbroihier — September 5, 2014 at 10:13 am

    The Peanut Butter S’Mores Blondies recipe is a bit unclear. I believe the eggs and vanilla are supposed to be added to the sugar/peanut butter mixture. Then, that mixture is stirred into the dry ingredients.

    Just put them in the oven–can’t wait to try them!

  6. #
    Annalise @ Completely Delicious — September 5, 2014 at 2:00 pm

    These sounds SO GOOD! So exactly my kinda treat.

  7. #
    Gaby — September 6, 2014 at 8:33 am

    Totally irresistible! I want these now!

  8. #
    Jamie | My Baking Addiction — September 7, 2014 at 11:46 am

    I’m loving every layer of these delicious bars!

    • #
      Tessa — September 7, 2014 at 9:54 pm

      Thanks so much Jamie!

  9. #
    Emily — September 13, 2014 at 9:03 am

    Mine are in theoven now but used a 9x 13 glass pan and they are slowly baking overthe edges! I doubled the recipe for a tailgate. Help!! Maybe that was stupid….

  10. #
    Ashlee — October 11, 2014 at 11:18 am

    Baked these the other night for a friends bday… Everyone LOVED them!! I did have to bake them about 10 extra mins and was still concerned they were not cooked all the way through but they were gone so fast, no one seemed to mind. Def gonna make these again!!!

    • #
      Tessa — October 12, 2014 at 10:40 pm

      Yay! So thrilled to hear that 🙂

  11. #
    Shelby — October 23, 2014 at 3:48 pm

    Do you refrigerate the leftovers? Just made them and they are fabulous!!

    • #
      Tessa — October 23, 2014 at 4:32 pm

      I just stored them in an airtight container at room temp!

  12. #
    Jennifer — November 26, 2014 at 7:18 am

    The recipe says to grease the pan but the pictures show a foil-lined pan. Do you line with foil, then grease the foil?

    • #
      Tessa — November 26, 2014 at 8:49 am

      Yes! Just corrected the recipe instructions 🙂

  13. #
    Lorilee — February 1, 2015 at 11:59 am

    I sooo wanna make these but don’t have Hershey bars! Only have morsels… how can I substitute to make this deliciousness NOW!?!?!

  14. #
    Rebecca — February 8, 2015 at 11:19 pm

    If we don’t have marshmellow creme will normal marshmellow suffice? Australia doesn’t stock marshmellow creme

  15. #
    Jen Dandrea — November 30, 2016 at 9:33 pm

    I made thee today for my book-club gals and they LOVED them! I do have to say that mine weren’t quite as pretty as yours, but they were delicious! Thanks for a great recipe!

  16. #
    Ashley — August 26, 2018 at 1:49 pm

    I made these today and found that there was too much blondie which resulted in the finished squares being really tall/thick. I don’t think the graham crackers are really necessary because the taste blends in with the taste of the blondie and isn’t really distinguishable in the finished product but also the graham crackers don’t really melt into the squares so my squares ended up wanting to separate into top and bottom halves. If I make this again I’ll use less blondie mix (or a bigger dish) and I’ll skip the graham crackers.

  17. #
    Leslie — March 1, 2019 at 5:28 pm

    Can the blondies be frozen?

  18. #
    Jenny W. — May 29, 2019 at 6:12 pm

    INCREDIBLE. Best combo of flavors ever and the blondie itself is OUTRAGEOUS. how does this not have 5 stars….

  19. #
    Jennifer — June 12, 2019 at 5:45 pm

    Hi can does this recipe taste ok without peanut butter

  20. #
    Liel — August 10, 2019 at 9:32 pm

    With what can i replace the marshmallow crème?

  21. #
    Liz — January 24, 2020 at 9:36 am

    Looks so good! What type of peanut butter works best for this recipe?

  22. #
    Jules Lasater — February 14, 2020 at 11:19 pm

    Very delicious and easy

  23. #
    Shandra — May 31, 2020 at 12:55 pm

    My absolute FAVORITE recipe of Tessa’s!! I love the peanut butter blondie bit so much I might have to make them on their own. I’ve made these a few times and will say that I used a larger pan (9×12) because the first time I made them they were simply too thick. I think next time I’ll leave out the graham crackers, just because I think the blondie part is enough of a substitute for graham crackers. The graham crackers do soften up while baking, which helps with cutting, I didn’t notice the separation like one reviewer said. I was lazy another time I made these and just used store bought peanut butter cookie dough to substitute for the blondie part and they were not nearly as good – won’t make that mistake again! Absolutely delicious!!

  24. #
    Linda — September 17, 2020 at 3:36 pm

    Do you have nutritional formation for this recipe? Specifically carbohydrates.

  25. #
    Jake — October 15, 2020 at 1:10 pm

    Mediocre recipe. I think it would be slightly better if quality chocolate (not hersheys) would be used.

  26. #
    Laura Lynn — April 18, 2021 at 7:49 am

    These were amazing. Really easy and quick to make. I waited overnight for them to set up in the fridge before I cut the bars. I got 12 bars and then microwaved for about 15 seconds before eating. This might be one of my favorite recipes.

    • #
      Tessa — April 19, 2021 at 3:57 pm

      Hooray!! So glad you love these blondies, Laura!

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