These Smores Cookie Bars bring all the cozy campfire flavors you love into one easy, oven-baked treat—no fire pit required!
A buttery brown sugar cookie dough base blended with graham cracker crumbs creates the perfect chewy texture with layers of chopped chocolate and gooey marshmallow fluff.
I love bar cookies because they’re quick and simple to make, and a pan can easily feed a crowd. This recipe joins other favorites like Butterscotch Brownies, Toffee Chocolate Blondies, and Coconut Chocolate Chip Bars.
If you love the flavor of smores, be sure to check out our tasty S’mores Snack Mix. And for another yummy, chewy cookie with chocolate and marshmallows, you’ll love our easy recipe for Hot Chocolate Cookies.
Why You’ll Love This Recipe
Quick and Easy – You can mix everything in just one bowl and have a 9- by 13-inch pan of these bars baked and ready in under an hour—perfect for busy days or last-minute guests.
Classic s’mores flavor – You get graham cracker, melty chocolate, and gooey marshmallow in every bite, all in a simple bar cookie.
Crowd-pleasing dessert. These bars travel well, cut neatly, and make enough to share—ideal for potlucks, family gatherings, bake sales, and holidays.
Ingredients and Substitutions
If you’re a visual person, here’s a photo of what you’ll need to make this recipe:
- Unsalted butter – If you only have salted butter on hand, skip the added salt in this recipe.
- Light or dark brown sugar
- Vanilla extract
- 2 large eggs
- All-purpose flour
- Graham cracker crumbs – made by crushing 16 full sheets of graham crackers.
- Baking powder – make sure it’s fresh, for best results.
- Fine sea salt
- Marshmallow creme – also known as marshmallow fluff.
- Chocolate bars – I used Hershey’s milk chocolate bars for this batch, but you can use semisweet chocolate, bittersweet, or any chocolate bar you like. You can also substitute a 12 ounce bag of chocolate chips if you prefer.
Step by Step Instructions
STEP ONE: Preheat the oven to 350 degrees F. Spray a 9- by 13-inch baking dish with baking spray and line the bottom of the pan with parchment paper.
STEP TWO: Combine the butter and brown sugar and cream until smooth. Add the eggs and vanilla, and mix well.
STEP THREE: Add the flour, graham cracker crumbs, flour, and salt, and mix well.
STEP FOUR: Press about 2/3 of the dough mixture in the bottom of the baking dish.
STEP FIVE: Dollop the marshmallow cream over the dough. It doesn’t have to be perfect!
STEP SIX: Top with about 2/3 of the chocolate pieces.
STEP SEVEN: Spoon the remaining dough on top, leaving some places open so the chocolate and marshmallow show through.
STEP EIGHT: Bake until the edges are lightly browned and dough on top is baked, about 30 minutes. Immediately top with the remaining chocolate pieces.
STEP NINE: Cool to room temperature, and cut in 12 bars.
How to Store Leftovers
Store these chewy cookie bars tightly covered in the refrigerator for up to 3 days. You can warm the chilled bars in the microwave for 25-30 seconds to make them soft and chewy.
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Here’s the full, printable recipe:
Smores Bars with Graham Crackers
Equipment
- 9- by 13-inch baking pan
Ingredients
- 1 cup unsalted butter softened
- 1 1/4 cups brown sugar
- 1 teaspoon vanilla
- 2 eggs
- 2 cups flour
- 2 cups graham cracker crumbs about 16 full sheets
- 1 teaspoon baking powder
- ¼ teaspoon salt
- 7 ounces marshmallow fluff
- 12 ounces milk chocolate bars chopped or broken in pieces
Instructions
- Preheat the oven to 350 degrees F. Grease a 9- by 13-inch baking dish, and line the bottom with a sheet of parchment paper.
- In the bowl of a stand mixer, combine the softened butter and brown sugar. Cream until smooth. Add in the eggs and vanilla and mix until combined.
- Add in the flour, graham cracker crumbs, baking powder and salt. Mix thoroughly, scraping down the sides as needed.
- Press approximately ⅔ of the dough into the bottom of the prepared pan.
- Dollop the marshmallow fluff over the dough and spread slightly.
- Place about ⅔ of the chocolate pieces over the marshmallow fluff.
- Top with pieces of the remaining dough, leaving some of the marshmallow and chocolate exposed.
- Bake in the preheated oven until the edges are just beginning to brown, about 30 to 35 minutes. Remove from the oven and immediately top with the remaining chocolate pieces.
- Allow to cool to room temperature before cutting. Makes 12 large bars.
Notes
Nutrition
Frequently Asked Questions for Smores Bars with Marshmallow Fluff
You can use other mild flavored cookies like Nilla Vanilla Wafers, Pepperidge Farm Chessmen cookies, or shortbread cookies.
You can use your favorite gourmet chocolate bars, quality chocolate chips, or even chopped Reese’s peanut butter cups or chocolate toffee bars like Skor or Heath.
Nutrition Disclaimer: All nutritional information shared on this site is an approximation. I am not a certified nutritionist, and any nutritional information should be used as a general guideline.
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Eliza Cross is the creator of Happy Simple Living, where she shares ideas to help busy people simplify cooking, gardening, holidays, home, and money. She is also the award-winning author of 17 cookbooks, including Small Bites and 101 Things To Do With Bacon.
