Skip to Content

Easy Cake Mix S’mores Bars

Share with your friends!

Enjoy the goodness of s’mores without the campfire! These easy bars start with a cake mix, so they take jus a few ingredients and hardly any prep. You’ll be enjoying your sweet treat in no time!

close up stack of s'mores bars with fudgy center showing

     Start with a chocolate cake mix, graham crackers and marshmallows and end up with a delicious and easy dessert! The fudgy cake layer and toasted marshmallows are melt in your mouth good and the graham crackers help hold it all together just like in a real s’more. You’ll find these bars are a great way to serve perfectly golden marshmallows to a crowd without standing in the smoke.

      We have been focusing on extra easy recipes lately.  With everything going on, our days feel even busier than normal.

    My motivation has also been at an all time low. But that doesn’t mean we can’t eat yummy food anyway.   

     It just means we are relying on a few more shortcuts than normal.  Which I think is permission we all should be willing to give ourselves every now and again.

     Don’t worry, it doesn’t mean we’ve devolved into only eating desserts. We are eating real meals too.

bowl of chocolate cake mix mixture with pan lined with graham crackers in background.

We are treating ourselves to a little extra comfort food. Luckily our CSA will be starting up soon so our fresh vegetable consumption is about to take over the dinner table.

All of that to say this recipe is super quick and simple. Using a cake mix means you just need to grab a few ingredients, a bowl and a spoon.

You can be digging in within a half hour. In fact, with a little help getting it in and out of the oven, even small children could make these by themselves.

pan of half cooked s'mores bars with bright white marshmallows on top.

Tips and tricks:

I like to line my pan with aluminum foil before using it. That way you can lift the bars out of the pan to cut them. It is not 100% necessary, it’s just my preference.

 The easiest way to line the pan with aluminum foil is to flip the pan over and wrap the foil around the outside first. Then slide it off and fit it inside the pan. I tend to get fewer wrinkles and cleaner corners that way.

pan of s'mores bars fresh from oven with golden brown marshmallows on top

I have found the easiest way to cut these bars is to take a big knife and apply even downward pressure. It makes nicer cuts that trying to drag a knife across the bars and through sticky marshmallows.

 Store the bars in a single layer in an airtight container at room temperature. If the marshmallows start to dry out after a couple days, refresh your piece by putting it in the microwave for a few seconds. You’ll be back to gooey sweetness in no time!

More chocolate cake mix hack ideas

Turn a chocolate cake mix into something fabulous by baking up a chocolate cherry fudge bundt cake. It is moist, delicious and pretty enough to serve to company.

 For easy cookies, bake up some chocolate gooey butter cookies. They are soft, tasty and only take a few ingredients.

hand holding a gooey s'more bar

Whip up soft chocolate whoopie pies with the help of a cake mix, then fill them with a tasty peanut butter marshmallow filling for an extra memorable treat!

Or make a batch of layered monster cookie brownies with a box of cake mix. They feature a graham cracker crust and peanut butter topping for an extra special treat.

Love this recipe? Give it a ⭐⭐⭐⭐⭐ review in the recipe card below!

Yield: 12 Servings

Easy Cake Mix S'mores Bars

stack of gooey chocolate bars with graham cracker base and toasted marshmallow on top

Enjoy the goodness of s'mores without the campfire! These easy bars start with a cake mix, so they take jus a few ingredients and hardly any prep. You'll be enjoying your sweet treat in no time!

Prep Time 10 minutes
Cook Time 16 minutes
Total Time 26 minutes


  • 8 graham crackers
  • 15.25 ounce chocolate cake mix
  • 2 large eggs
  • 1/2 cup vegetable oil (or other neutral flavored oil)
  • 10 ounce bag marshmallows


  1. Preheat oven to 350°F. If desired, line a 9x13-inch pan with aluminum foil. Spray with nonstick spray.
  2. Place graham crackers on the bottom of the pan to form a base. 
  3. In a medium bowl, stir together cake mix, eggs and oil until just combined. Dollop over graham crackers and spread to form an even layer.
  4. Bake for 10 minutes. Remove from oven and distribute marshmallows over the top of the chocolate layer.
  5. Return to oven and bake for an additional 5-6 minutes or until the marshmallows reach your desired level of doneness.
  6. Allow to cool for at least 10 minutes before slicing and serving. 

Recommended Products

As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases. Please view my disclosure page for more information.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 351Total Fat: 14gSaturated Fat: 2gTrans Fat: 0gUnsaturated Fat: 11gCholesterol: 31mgSodium: 353mgCarbohydrates: 56gFiber: 1gSugar: 30gProtein: 4g

All nutritional information is estimated and will depend on the exact ingredients you use.

Did you make this recipe?

I'd love to see it! Share a picture on Instagram or Pinterest and tag me @carleecooks to let me know how it went!

Enjoy the goodness of s'mores without the campfire! These easy bars just take a few ingredients and hardly any prep. You'll be enjoying your sweet treat in no time!

Share with your friends!

Skip to Recipe