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Chocolate S'mores Gooey Bars

By // (Updated Dec 31, 2025) // 2 Comments

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Chocolate cake mix base filled with marshmallows, chocolate chips, chocolate marshmallows and condensed milk. These Chocolate S'mores Gooey Bars are extra sweet so a batch goes a long way! 

Ever since I made the White Chocolate Gooey Bars I knew I wanted to make a chocolate version!

two pieces of Chocolate S'mores Gooey Bars on a white plate

This recipe is so simple and so delicious! I couldn't stop picking at the pan-I secretly always pick at the pan and create another straight line so it's not obvious how much I have actually devoured! 🙂 Enjoy 🙂 

Next time, check out my S'mores Cookie Bar Recipe!

★★★★★ Please let me know if you make this recipe by leaving a star rating and comment below!

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close up of Chocolate S'mores Gooey Bar on a white plate

Chocolate S'mores Gooey Bars

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Chocolate cake mix base filled with marshmallows, chocolate chips, chocolate marshmallows and condensed milk. These Chocolate S'mores Gooey Bars are extra sweet so a batch goes a long way!

  • Total Time: 45 minutes
  • Yield: 9-16 Bars 1x

Ingredients

Units Scale
  • 1 Box Devils Food Chocolate Cake Mix
  • 4oz (½ Cup) Softened Unsalted Butter
  • 1 Large Egg, at room temperature
  • 4 ½ Full Honey Graham Crackers
  • 2 ½ cups of Milk Chocolate Chips
  • 1 cup of Mini Marshmallows
  • 1 Cup of Chocolate Marshmallows (You can use 2 cups of regular Marshmallows)
  • 7oz Sweetened Condensed Milk

Instructions

  1. Preheat the oven to 350F/180C & grease an 8-inch square baking pan.
  2. Place the cake mix, softened butter & egg in a large bowl and mix together until combined- you will be left with a thick dough.
  3. Press half of the dough into the prepared pan. Layer the dough with graham crackers, chocolate chips, and marshmallows.
  4. Press the rest of the dough on top of the marshmallows then drizzle with condensed milk.
  5. Bake for 25-30 minutes. As tempting as it will look coming out of the oven do your best to let it cool as it will be super gooey! And you could easily burn yourself or make a huge mess! 

Equipment

Notes

  • Author: Elizabeth Waterson
  • Prep Time: 15
  • Cook Time: 30
  • Category: Dessert
  • Method: Bake
  • Cuisine: American
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    If you love this recipe, please consider leaving a ⭐ star rating ⭐ when you post a comment. Star ratings help people discover my recipes online. I am incredibly grateful for your support! —xx Liz

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  1. JJ says

    Recipe says " Layer the dough with graham crackers, chocolate chips, and marshmallows." Ingredients do not include graham crackers - how many? crushed? What?

    Reply

    • Elizabeth Waterson says

      Hi JJ, sorry for the delay and confusion. I have updated the recipe card, so sorry for the mishap! Please let me know if you have any questions or if you try the recipe! XX Liz

      Reply