These gooey s’mores bars have all the flavor of the classic campfire treat with a graham cracker crust, chocolate bar pieces and marshmallows in a soft chewy cookie bar!

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Gooey S’mores Cookie Bars
It’s not summer time without a s’mores dessert and this s’mores bars recipe has all the delicious flavors of a traditional s’mores but no fire is required! Other treats we love include frozen s’mores, s’mores cookies and s’mores pie, too.
Gooey s’mores bars are the best parts of my favorite congo bar recipe and blondie recipe combined with a graham cracker crust, chewy center loaded with milk chocolate candy bar piece and a marshmallow top. It’s the easiest way to make s’mores!
Ingredient Notes
- Graham cracker crust: Made with melted butter and graham cracker crumbs.
- Cookie dough: Brown sugar, butter, eggs, flour, baking powder, salt, vanilla, semi-sweet chocolate chips and mini marshmallows.
- Topping: Milk chocolate candy bar, graham cracker pieces and marshmallows.
How to Make S’mores Bars

- Make crust. Combine melted butter and graham cracker crumbs in a small bowl with a fork. Press crust down into a greased 9×13″ baking dish and set aside.
- Cream dough. In a large bowl, cream together butter and sugar. Add in eggs and vanilla and stir until combined. In a separate bowl, mix the baking powder and salt with 1 cup of flour. Then pour flour mixture into the butter mixture and stir in the rest of the flour. Fold in chocolate chips and marshmallows.
- Assemble s’mores bar recipe. Press dough into pan with a spatula or flour on your hands. The dough goes right on top of the crust. Then add the candy bar, graham cracker and marshmallows on top.
- Bake. Bake at 325°F for 30-35 minutes, or until lightly browned. Oven temps will vary. Test with a toothpick. The dough should be soft in the center.

Recipe Tips
- Line your baking dish with foil: It helps with easy removal and requires less clean up.
- Add extra toppings: Don’t forget to top your dough with extra marshmallows, candy pieces and graham crackers. It adds AMAZING flavor.
- Let cool before cutting: The bars continue to set as they cool and will be easier to cut.
- Add a scoop of homemade ice cream and this bar recipe is the best summer dessert you can enjoy year round!
- Store in an airtight container: Keep at room temp in an airtight container for about 3 days (or in the fridge for about 5 days).
- Wrap and freeze: You can also freeze them. Let cool, then wrap in foil and place in airtight container/bag. Store in freezer for 2-3 months.

You may also love chocolate marshmallow cookies, homemade marshmallow fluff and Golden Graham bars.
More Summer Dessert Recipes

S’mores Bar Recipe
Video
Ingredients
For the crust:
- ½ cup butter , melted
- 1 ½ cups graham cracker crumbs
For the dough:
- 2 cups light brown sugar
- ⅔ cup salted butter , softened
- 2 eggs
- 2 ½ cups all-purpose flour
- 2 ¼ teaspoons baking powder
- ½ teaspoon salt
- 1 teaspoon vanilla extract
- 1 cup semi-sweet chocolate chips
- 1 cup mini marshmallows
For the topping:
- 1 milk chocolate candy bar , broken into pieces
- 1 graham cracker , broken into pieces
- ½ cup marshmallows
Instructions
- Prep. Preheat oven to 325°F and line a 9×13" baking dish with foil. Spray with nonstick spray.
- Combine 1/2 cup melted butter and 1 1/2 cups graham cracker crumbs into a small bowl with a fork. Then press down crust in baking dish on top of foil.
- Cream 2/3 cup butter and 2 cups brown sugar in a large bowl. Add in 2 eggs and 1 teaspoon vanilla and stir until combined. In a separate bowl, mix the 2 1/4 teaspoons baking powder and 1/2 teaspoon salt with 1 cup of flour. Pour flour mixture into the butter mixture and stir in the rest of the flour. Fold in 1 cup chocolate chips and 1 cup marshmallows.
- Press dough into pan with a spatula or flour on your hands. The dough goes right on top of the crust. Then add the candy bar pieces, graham cracker pieces and marshmallows on top.
- Bake for 30-35 minutes, or until lightly browned. Oven temps will vary. Test with a tooth pick. The dough should be soft in the center.
- Allow bars to cool and then enjoy with a scoop of ice cream or cold glass of milk!
Last step: Please leave a comment and rating after you make the recipe.
Nutrition
Nutrition provided is an estimate. It will vary based on specific ingredients used.

nicky
Made and brought to share with friends. We loved them!!
Jamielyn
Thanks for commenting Nicky, I am so happy you all loved them!
Jennifer
I have them baking right now…can’t wait to try them. :)
Jamielyn
Hope you enjoyed them! Love those delicious bars! :)
Ila
These are delicious. Made them for a back to school treat for a few friends starting kindergarten and they loved them!
Jamielyn
Glad you loved them! Thanks for stopping by and commenting! :)
Ally
This looks very yummy, definitely going to make it! Just want to clarify, are there mini marshmallows in the cookie dough? Do you just fold them in at the same time as the chocolate chips? Thank you! :)
Jamielyn
Yeah I just folded the marshmallows in at the same time as the chocolate chips and then placed a few extra marshmallows on top! :)
Erin
Exciting recipe, I just wish the step being discussed above regarding folding in the marshmallows in to the dough, was included in the instructions that are already listed. I had to scroll through the comments to see if anyone else had a similar concern (as I am in the midst of making them).
Stacy
I pinned these yesterday, made them last night, tried this morning and asked them to marry me. We will be very happy together!!
Jamielyn
Haha I love this! :)
Angie
I tried making these this evening and the graham cracker crust was more of a batter consistency instead of being easy to spread like a crumbly crust. In fact, I couldn’t even spread it over the entire surface of the pan. Any suggestions on what I could have done wrong? I followed the recipe…
Jamielyn
Hi Angie! Maybe next time try adding more graham cracker crumbs or less butter. I’m not sure why it was a batter consistency, it might be different in different climates? Play around with it and add more or less to get the consistency you want! Sorry about that!
DesignedByBH
These look amazing! I made a “Yummy S’Mores!” board just because of these!!! Thanks for the great recipe! :)
Jamielyn
Love it! There are so many good s’mores recipes…s’mores bars and s’mores cookies are my favorite!
Laurel @ Ducks in a Row
Oh my , these do look delicious. In fact, I think I have extra miles to run just by looking at them!
Heather @ French Press
these look SO good! perfect for s’mores day tomorrow
Zainab @ Blahnik Baker
very yummmy!!! Love s’mores :)
Emily
i live in australia and i am a huge fan but our oven temps are different would i bake until golden?
Jamielyn
Hi Emily! Yes, just bake them until they are golden on the top but still seem soft to get the gooey center! :)
Becky
Can you clarify where the crust (graham crumbs and melted butter) fit it? Does that get pressed into the pan before the dough? Does it need to be baked a bit before-hand? These look so yummy!
Jamielyn
Sorry about that, it should be fixed now! Yes, after you mix the graham cracker crumbs and melted butter, press it into the foil lined pan before the dough. You don’t need to cook it before the dough goes on, just cook it all together! Hope you enjoy! :)
Erin
I really want to make these now…but my kids ate all my graham crackers yesterday :(
Julie
I am literally salivating looking at these pictures!
Jamielyn
You’ll have to try them this weekend, they are better than they look! :)
Elaine
I will make them but substitute for dairy free and gluten free for my grandson and me! No one will know! Thanks.
Jamielyn
Let us know how it goes! Hope you enjoy them Elaine!
Julie
Um, YUM! Holy cow these look good!
Aimee @ ShugarySweets
Oh my word, these look perfect for a summer BBQ. :)
Jamielyn
That’s what I made them for and everyone gobbled them right up! :)
Kari
Hi! I just started getting everything out to make these for my sons 4th birthday tomorrow when I realized I only have full size marshmallows. Would they work in place of the mini marshmallows if I cut them up? Not sure if you will see this tonight but if so and you could let me
Know your thoughts it would be much appreciated! :)
I Heart Naptime
Yes that should definitely work!
Gloria @ Simply Gloria
Yep, gotta say these are looking quite yummy! Love how easy they are! Pinning (=
Lindsay @ Life, Love and Sugar
They look delicious!