S'mores Fudge Bars
Filed Under: Bar Dessert | Dessert | S'mores

S’mores Fudge Bars

  |  
June 16th, 2023
4.85 from 20 votes
4.85 from 20 votes

S'mores Fudge Bars have a thick layer of buttery graham cracker crust, rich, fudgy chocolate filling, and a homemade toasted marshmallow topping. A delicious summertime treat you can enjoy all year long!

Yield: 9 large squares or 18 small squares

Prep Time: 30 minutes

Cook: 10 minutes

Tessa's Recipe Rundown...

Taste: No surprises here… these babies taste just like s’mores!
Texture: The crust is incredibly thick, chewy, crunchy, and buttery while the filling the rich and fudgy, and the topping is sticky and gooey. A great array of textures in every bite!
Ease: The marshmallow topping might seem intimidating, but I promise, it’s easier than you might think.
Pros: Perfect way to indulge in s’mores.
Cons: Requires a few special tools (food processor, electric mixer, kitchen torch or broiler, and a candy thermometer).
Would I make this again? Yes!

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Is there anything more quintessentially ‘summery’ than a s’more?

These S’mores Fudge Bars take that classic campfire treat and pack it all into a convenient, easy-to-serve bar form!

Graham cracker crust, a rich and silky-smooth chocolatey fudge filling, all topped off with a homemade marshmallow topping.

I find this recipe super fun to make, and the homemade marshmallow takes it to another level. Homemade marshmallow is so much better than store-bought marshmallow cream, and I promise, it’s easier to make than you might think!

S’mores Fudge Bars are the summertime treat you can enjoy all year long.

Perfect for parties and potlucks, these S’mores Fudge Bars are sure to be a hit.

beautiful stack of S'mores Fudge Bars, stacked three high

How to Make S’mores Fudge Bars

What’s the Best Pan for S’mores Fudge Bars?

This recipe uses an 8 by 8-inch pan. This is my favorite pan. I love it for baking brownies, blondies, and practically everything else!

Making Marshmallow

The finishing touch for our S’mores Fudge Bars! I know asking you to make a marshmallow might seem intimidating, but I promise it’s super easy. Just be sure to use a candy thermometer to bring the sugar mixture to exactly 240°F and slowly and cautiously add the mixture to soft peak egg whites. If you really don’t want to make it, you can use marshmallow fluff instead, but it will be sweeter and won’t look as pretty or slice as nicely. 

Is the Marshmallow Safe to Eat? 

  • This marshmallow method cooks the sugar first, so when we add this hot syrup to the eggs, this should raise the temperature to the point where they are safe to consume.
  • If you or someone you’re serving is immune-compromised or pregnant, just use an instant-read thermometer to verify that your egg mixture has reached 160°F. 
  • You could try using pasteurized egg whites from a carton. Just note that we haven’t tested this, so we can’t guarantee that pasteurized egg whites will produce the same results as fresh egg whites. 

How to Store S’mores Fudge Bars

These bars can be stored in an airtight container in the refrigerator for up to 5 days.

uncut slab of s'mores fudge bars, showing the three delicious distinct layers

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4.85 from 20 votes

How to make
S'mores Fudge Bars

Yield: 9 large squares or 18 small squares
Prep Time: 30 minutes
Cook Time: 10 minutes
Inactive Time 1 hour
Total Time: 1 hour 40 minutes
S'mores Fudge Bars have a thick layer of buttery graham cracker crust, rich, fudgy chocolate filling, and a homemade toasted marshmallow topping. A delicious summertime treat you can enjoy all year long!

Ingredients

Crust:

  • 20 full graham crackers
  • 1/4 cup granulated sugar
  • 1/2 teaspoon salt
  • 12 tablespoons unsalted butter, melted

Fudge filling:

  • 2 cups semisweet chocolate chips
  • 1 (14 ounce) can sweetened condensed milk

Marshmallow topping:

  • 2 large egg whites
  • 1/4 teaspoon cream of tartar
  • 3/4 cup granulated sugar
  • 1/2 cup light corn syrup
  • 1/4 cup water
  • 1/4 teaspoon salt
  • 1 1/2 teaspoons vanilla extract

Directions

For the crust:

  1. Preheat the oven to 350°F. Line an 8x8-inch baking pan with foil.

  2. Place the graham crackers, sugar, and salt in the bowl of a food processor and pulse until finely ground. Add the melted butter and pulse until the mixture is moistened. Press the mixture into the bottom of the prepared baking pan. Bake for 10 minutes. Remove to a cooling rack and let cool completely.

For the filling:

  1. In a small saucepan set over medium-low heat, combine the chocolate chips and condensed milk. Heat until the mixture is melted, thick, and smooth, stirring constantly. Pour over graham cracker crust. Place in the refrigerator while making the marshmallow topping.

For the marshmallow topping:

  1. In the bowl of an electric mixer fitted with the whisk attachment, beat the egg whites and cream of tartar until soft peaks form.

  2. Meanwhile, in a small saucepan set over medium-high heat, combine the sugar, corn syrup, water, and salt. Bring the mixture to a boil and continue to cook until a candy thermometer registers exactly 240°F. Immediately remove from heat. Turn the mixture on low speed and carefully and gradually drizzle the syrup into the egg whites. Increase speed to medium-high and beat until the mixture is thick and glossy and looks like marshmallow fluff, about 7 minutes longer. Add in the vanilla and beat until combined.

  3. Spread the marshmallow topping evenly over the chocolate fudge layer. Use a kitchen torch to gently torch the marshmallow layer until lightly golden. Alternatively, place the pan under the broiler and broil for 1 minute, or until lightly golden, keeping a close eye on it (it can burn quickly!).

  4. Refrigerate the pan for at least 1 hour before cutting into squares and serving. The squares can be stored in an airtight container in the refrigerator for up to 5 days.

Recipe Notes

Slightly adapted from Cookies and Cups
Course : Dessert
Cuisine : American
Keyword : bar dessert, s'mores, s'mores bars
Tessa Arias
Author: Tessa Arias

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!)

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!)

Find Tessa on  

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Recipe Rating




  1. #
    Mario — September 14, 2023 at 1:58 am

    I was wondering if the marshmallow topping will start to weep or sweat after a certain amount of time? This seems to happen with meringue. I live in a very humid climate (Taiwan) so I would need to keep it in the fridge.

    • #
      Kiersten @ Handle the Heat — September 15, 2023 at 8:23 am

      Hi Mario! While none of us at Handle the Heat live in a very humid climate to compare (Tessa lives in Arizona, which is in the desert, so it’s super dry!), the marshmallow topping will likely weep a little in your climate – but luckily, these bars can be stored in an airtight container in the refrigerator for up to 5 days, so that should prevent any issues. Happy baking 🙂

  2. #
    Sarah — July 16, 2023 at 3:33 pm

    Good

    Lol my children especially loved the homemade marshmallow fluff

  3. #
    Kerinsa — July 15, 2023 at 8:48 am

    Hi there. I’m just curious if these would turn out if I use milk chocolate chips instead of semi sweet. Thank you.

    • #
      Kiersten @ Handle the Heat — July 17, 2023 at 9:58 am

      Hi Kerinsa! That will work just fine – just note that using milk chocolate will result in sweeter bars than using semi-sweet. Happy baking! 🙂

  4. #
    Nancie — December 11, 2022 at 3:02 pm

    My sincerest apology’s….I meant that previous review to be for someone else and something else. YOUR recipe is PERFECTION!!!!! I modified the fudge slightly. Added. Tablespoon of butter and I used vanilla and caramel extracts. I already make my own marshmallows, so I cut up a few and added it to the fudge layer.

    If you want to delete my wrong review, feel free…or you can keep it and laugh at my embarrassment…. Up to you. ~ Little Yummys

    • #
      Kiersten @ Handle the Heat — December 13, 2022 at 8:49 am

      Hi Nancie! Thank you for correcting your review! I did remove your previous review, as I didn’t want other readers to get confused 🙂 I’m SO glad to hear that you enjoyed these bars, and thanks so much for your comments! Happy holidays 🙂

  5. #
    James Talvy — November 22, 2022 at 9:23 am

    “20 full graham crackers”…. do you have weight in grams or dimensions? I think sizes may vary.

    • #
      Kiersten @ Handle the Heat — November 22, 2022 at 10:05 am

      Hi James! This is an older recipe that needs to be updated with proper metric measurements (it’s on our list!), but I just weighed some graham crackers in my own kitchen, and 20 full-size (2.5×5-inch) graham crackers = about 320 grams. I hope that helps! Happy baking 🙂

      • #
        James Talvy — November 22, 2022 at 1:31 pm

        thx much! This is very hemlock since then I can use 320g of Graham cracker crumbs I already have.

        • #
          Kiersten @ Handle the Heat — November 22, 2022 at 1:47 pm

          Perfect! Let us know what you think of these bars once you have given them a try! 🙂

  6. #
    Jeannette — November 17, 2022 at 9:38 am

    I made these for my cousin last year for Christmas and just realized I never let you know how good they were! Thank you! What a great idea! So nice to see something entirely different than the usual brownies or Rice Krispie squares, although those are very good.

    • #
      Kiersten @ Handle the Heat — November 17, 2022 at 12:49 pm

      Yay! So glad these were a hit, Jeanette!

  7. #
    Danielle — April 13, 2021 at 10:36 am

    Made these for a “Summer Cookie Box” for coworkers and ended up eating a leftover bar…these are insane. Every layer has something to offer – I’m over here trying to pick a favorite and can’t! And they are THICK. I was surprised they went into an 8×8 pan tbh. Should probably stick to 20 squares as I can’t imagine eating 1/9 of the pan in one sitting.

    Amazing recipe!

    • #
      Tessa — April 13, 2021 at 2:47 pm

      YAY! I’m so happy to hear you loved these bars, Danielle!!

  8. #
    Sharif Siddique — November 19, 2020 at 5:51 am

    Hello there,
    That’s an amazing article about S’mores Fudge Bars.
    Keep your good job.

  9. #
    Techwhippet — November 13, 2020 at 11:22 am

    Hi there,
    Thanks for your best article about smores fudge bars.
    Keep your good job.

  10. #
    poolity — November 5, 2020 at 11:50 pm

    Hello Teesa,
    That’s great article about smores fudge bar. Keep your good job.

  11. #
    Pauline — July 31, 2020 at 9:50 am

    Best recipe ever! They didnt last long……….
    My crust turned out much thicker than the picture, I didnt have graham crackers only crumbs so I added to the melted butter. Would be nice to know exactly how many cups are 20 full full graham crackers?

  12. #
    Lauren — July 19, 2020 at 6:41 am

    Loved the fudge and fluff topping and the recipe was so easy, but the bottom layer was so crumbly that it just fell apart

  13. #
    coco — July 17, 2020 at 9:32 am

    Could I just use marshmallow creme for the topping?

  14. #
    Suzanne — May 16, 2020 at 1:40 pm

    This looks so good! What a fun way to put all these classic flavors in one place!

  15. #
    Amber — April 24, 2020 at 11:19 am

    These look ravishing, and I’m going to try out the formula soon. Be that as it may, a large portion of the gear the formula says is required, I don’t really have. In any case, I’ve made Marshmallows previously and they ended up great, so I don’t think a Candy Thermometer is significant.

    Additionally, the wafers I’m certain you can granulate by hand, no?

    I’m simply attempting to assist others who don’t have the gear as it tends to be very costly to purchase and may put individuals of attempting to make this!!

    Try not to be put off!!

  16. #
    Tracey M. Dorsey — February 27, 2020 at 1:29 am

    The marshmallow topping is the cherry on the top for this dish. Also I was wondering can I use chocolate as a topping ? Let me know

  17. #
    Tracey M. Dorsey — February 27, 2020 at 1:27 am

    The marshmallow topping is the cherry on the top for this dish. Loved the idea. Cant wait to make some by myself . Also I was wondering can I use chocolate as a topping ? Let me know

  18. #
    Tracey M. Dorsey — February 27, 2020 at 1:27 am

    The marshmallow topping is the cherry on the top for this dish. Loved the idea. Cant wait to make some by myself . Also I was wondering can I use chocolate as a topping ? Let me know

  19. #
    poul@poolhunt — January 19, 2020 at 11:38 am

    i love chocolate do you like this

  20. #
    Delmer @Backpainchairslab — December 27, 2019 at 5:16 am

    I am a regular reader of your blog. I love smores fudge bar because it is amazing in taste.

  21. #
    Peter Crouch — December 16, 2019 at 1:16 am

    Chocolate looks really delicious and nice.
    I will try to try it for my family.

  22. #
    Malissa — November 10, 2019 at 6:48 pm

    This is the most beautiful thing I have seen all day. Thank you.

  23. #
    Sophie Anderson — November 7, 2019 at 6:45 pm

    Say what now?! S’mores fudge !! :O I need this now.

  24. #
    Whits@amusebouche — October 28, 2019 at 6:38 pm

    This is the most beautiful thing I have seen all day. Thank you.

  25. #
    Christina Moore@ YourMindYourBody — October 21, 2019 at 6:59 am

    Another classy desert. Awesome! I loved baking, and I loved to cook this kind of dish. I can sell it or prepare to my occasions. I can also give this as a souvenir or snack. Helpful and useful recipe. Thanks

  26. #
    Scarlet — October 7, 2019 at 9:49 am

    These look absolutely amazing. I am pinning these smores fudge bars to try soon. THey look so satisfying.

  27. #
    Laura Geisler — September 28, 2019 at 7:48 am

    I’d like to make these in advance for a wedding cookie bar. Can the crust and chocolate layer be made and frozen then day before add the marshmellow layer?

  28. #
    Kai Michel — September 10, 2019 at 9:52 pm

    Yummy. One of the best s’mores recipes I’ve seen. Its really nice.

  29. #
    Mike — September 3, 2019 at 9:59 am

    I cheated on my diet for this, worth it.

  30. #
    Richard Tunner — August 22, 2019 at 6:53 pm

    your killing me here.. these look wickedly delicious, i am so craving one right now! saving this recipe.. love it!

  31. #
    Susan Dubose — August 22, 2019 at 6:07 pm

    These look so beautiful and marvelous. Stunning pictures as always. I can only imagine how delicious they taste.

  32. #
    Anthony Allen — August 11, 2019 at 9:18 pm

    I made these for the family this weekend and they were a major hit! This was my first time making marshmallow – thank you for the detailed steps and pictures. Very helpful! I WILL be making these again, and again. Thanks again!

  33. #
    Karen — August 8, 2019 at 4:54 am

    I am intimidated to make the marshmallow topping. Can you substitute a jar of marshmallow fluff ? Tx!

  34. #
    Suzanne — August 6, 2019 at 6:55 pm

    I have never seen this kind of desert before, and it looks absolutely delicious! Ingenious idea.

  35. #
    Rimmy — July 30, 2019 at 7:58 pm

    Man does that look good! I just love anything S’mores flavored.

  36. #
    Daleann — July 2, 2019 at 11:27 am

    Can I double the recipe into a 9 x 13 pan?

    • #
      James Talvy — November 22, 2022 at 9:29 am

      A 9×13 pan is not quite double an 8×8 pan… 8×8 is 64 square inches and 9×13 is 117 square inches.

      Thus… you could do i t but the layers will be roughly 10% thicker… I am sure it is fine or you can same 10% of each layer and make an individual one 🙂

  37. #
    Jordan l cave — June 18, 2019 at 4:15 pm

    Will never be able to look at normal s’mores again. This bar was freaking awesomely delicious.

  38. #
    kathleen — May 21, 2019 at 9:23 am

    Was thinking of using marshmallow fluff but on second thought I think I’ll go with the topping. Looks delicious. Thanks Tessa.

  39. #
    Kara Mathys @Wellnessgrit — March 13, 2019 at 9:08 am

    These s’mores fudge bars looks so zesty and tasty! Absolutely love your creative idea! Thanks for sharing!

  40. #
    S — October 12, 2018 at 10:39 am

    Can I use coconut oil instead of butter for the crust?

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