A close-up of a gooey s'mores cookie bar on a white plate, featuring toasted marshmallows, chocolate chips, and a graham cracker crust.

Gooey S’mores Cookie Bars: 1 Amazing Recipe

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Written by Leo Maxwell

September 23, 2025

Okay, friends, gather ’round because I’m about to spill the beans on my absolute favorite way to get that campfire taste without a bonfire: these sensational s’mores cookie bars! Seriously, these aren’t just bars; they’re little squares of pure joy. Imagine a buttery, chewy cookie hugging layers of melty chocolate, gooey marshmallow, and that essential graham cracker crunch. It’s like a party in your mouth! I remember years ago, trying to recreate that magical s’mores flavor, messing with so many recipes until I finally landed on this one. It became my go-to for literally everything – book club, neighbor get-togethers, or just a Tuesday when I needed a serious pick-me-up. These bars are ridiculously easy to whip up, and trust me, they disappear faster than you can say “smores!” That feeling of creating something so delicious and seeing people’s faces light up? That’s why I started this whole baking adventure.

These s’mores cookie bars are an absolute winner, and here’s why:

  • Super Easy to Make: Seriously, you’ll be amazed at how simple these are, especially for how incredible they taste. No fancy techniques needed!
  • That Perfect Flavor Combo: It’s graham cracker, gooey marshmallow, melty chocolate, AND buttery cookie all in one bite. Heaven!
  • Crowd Favorite, Guaranteed: Whether it’s a potluck or a family gathering, these disappear in a flash. Everyone loves a good s’mores treat!
  • Perfect for Any Occasion: They’re fantastic for back-to-school treats, birthday parties, or just because you deserve a little something sweet.
  • Quick Fix Treat: Need a dessert in a hurry? These satisfy that craving in under an hour.

Alright, let’s get down to what we need to make these magic bars. It’s pretty simple stuff you probably already have, but paying attention to the details is key. Trust me, using good quality ingredients really makes a difference here!

Here’s your shopping list:

  • ¹ cup (that’s two sticks!) unsalted butter, make sure it’s softened so it creams nicely.
  • 1 cup granulated sugar
  • 1 cup packed light brown sugar – the brown sugar is crucial for that chewy, moist texture!
  • 2 large eggs
  • 1 teaspoon lovely vanilla extract
  • 3 cups all-purpose flour
  • 1 teaspoon baking soda
  • ½ teaspoon salt
  • 12 ounces of semi-sweet chocolate chips – we’ll use some in the dough and some on top!
  • 1 cup chopped milk chocolate or chocolate chunks – for that extra gooeyness!
  • 1 cup marshmallow creme, or if you prefer, use mini marshmallows. Whatever makes your s’mores dreams come true!
  • 1 cup crushed graham crackers – the base of our s’mores magic!

Okay, you don’t need a whole professional kitchen for these, but a few key things will make your life so much easier. You’ll definitely need a good old 9×13 inch baking pan – this is the magic size for getting that perfect ratio of layers and bake time. An electric mixer (stand or hand-held) is super helpful for creaming the butter and sugars, but honestly, a sturdy whisk and some elbow grease can totally work too! And of course, a couple of mixing bowls will be your best friends for getting everything prepped.

Alright, let’s get into the fun part – making these amazing s’mores cookie bars! It’s really not complicated at all. My kitchen gets a little messy when I make these, but it’s totally worth it. Just try to follow along, and you’ll have a pan of gooey, chocolatey goodness in no time. Remember to preheat that oven to 350°F (175°C) to start, and don’t forget to grease and flour your 9×13 inch baking pan. That little bit of prep makes a huge difference later!

First things first, let’s make the cookie dough itself. Grab your nicely softened butter and dump it into a big mixing bowl. Then, toss in both the granulated and packed light brown sugars. Now, get your mixer going, or if you’re feeling strong, use a whisk and some muscle! You want to cream these together until the mixture is light and fluffy – think pale yellow and airy. This is where a lot of that yummy texture comes from! Next, add your eggs, one by one, making sure each one is mixed in before you add the next. A splash of vanilla extract goes in now, too. In a separate bowl, whisk together your flour, baking soda, and salt. We do this separately so everything is evenly distributed. Now, slowly add those dry ingredients into the wet ones. Mix just until everything is combined; don’t go crazy overmixing here, or your bars can get tough. Lastly, stir in 8 ounces of those semi-sweet chocolate chips and all of your chopped milk chocolate or chunks. This dough is going to be thick and delicious!

Okay, time to build these beauties! Take about half of that glorious cookie dough and press it evenly into the bottom of your prepared pan. You want a nice, even layer so the whole bottom of the bar is cookie. No bare spots! Now for the s’mores magic: sprinkle your crushed graham crackers all over that dough layer. Make sure you get a good, even coating – this gives you that classic graham cracker taste in every bite. Next, it’s marshmallow time! You can dollop the marshmallow creme all over the graham crackers, trying to spread it out a bit, or if you’re using mini marshmallows, just sprinkle them generously. Finally, scatter the remaining 4 ounces of chocolate chips over the marshmallow layer. And now for the grand finale: carefully spread the rest of your cookie dough on top of all those yummy toppings. It might seem tricky, but just take your time and use a spatula or your hands to gently spread it out, making sure it covers everything underneath. It doesn’t have to be perfect; a little rustic charm is part of the appeal!

Baking and Cooling for Clean Slices

Pop that pan into your preheated oven at 350°F (175°C). You’ll want to bake these for about 25 to 30 minutes. Keep an eye on them! You’re looking for the edges to turn a beautiful golden brown and for the center to look set. It shouldn’t be jiggly anymore. Crucially, and this is super important for getting those nice, clean slices later, you HAVE to let these bars cool completely in the pan. Seriously, resist the urge! Trying to cut them when they’re warm will just result in a gooey mess (though still delicious, of course). For even cleaner cuts, or if you’re dying to try them and can’t wait, pop the whole pan in the fridge for about 30 minutes after it’s cooled a bit. This helps everything firm up perfectly. You can check out my s’mores brownies recipe for more gooey bar inspiration!

Alright, let’s talk secrets for making these s’mores cookie bars absolutely out-of-this-world! It’s all about a few little tricks I’ve picked up. For that perfect, melt-in-your-mouth gooey texture, the biggest thing is NOT to overbake them. Honestly, pull these bars out of the oven when the edges are golden brown and the center looks just *slightly* soft. It’ll set up as it cools, and that’s exactly the magic we’re going for! To get those super clean squares for slicing, chilling them completely is your best friend. Seriously, resist the urge to cut into them while they’re warm! I also love to toss in some chopped nuts, like pecans or walnuts, into the dough for an extra little crunch, or even switch out some of the chocolate chips for darker chocolate chunks for a more intense flavor. And hey, make sure that butter is *softened*, not melted or cold. It’s a small step but makes a huge difference in the final cookie dough texture and how they bake. Check out my blog for more tips and tricks!

Ingredient Notes and Substitutions

A few little ingredient tweaks can make these s’mores cookie bars even more your own! If you want a richer chocolate flavor, try using a mix of semi-sweet and dark chocolate chips, or even some milk chocolate chunks for an extra gooey factor. Can’t find marshmallow creme? No worries! Mini marshmallows work beautifully; just sprinkle them over the graham crackers. Some folks even like to add a handful of chopped nuts, like pecans or walnuts, to the dough for a little extra texture. And for the graham crackers, any kind works, but classic honey grahams give that perfect sweet crunch!

These s’mores cookie bars are best served at room temperature, especially if you want that perfect gooey marshmallow and melty chocolate experience. Just let them sit out for about 20-30 minutes after coming out of the fridge if you’ve chilled them for slicing. If you happen to have any leftovers (which is rare in my house!), you can store them in an airtight container at room temperature. They’ll stay delicious for about 3 days. Honestly, I find they taste even better the next day as the flavors really meld together! You can find more sweet treats like these over on our desserts page.

Got questions about these gooey delights? I’ve got answers!

The secret to super gooey s’mores cookie bars is all about the bake time and not overdoing it! Pull them out when the edges are golden but the center looks just a little soft. It’ll set up as it cools, giving you that perfect gooey bite!

For that perfect yummy thickness and even baking, a 9×13 inch baking pan is your best bet. It gives the layers just enough room to heat through without getting too thick or too thin, ensuring they bake up just right!

Absolutely! These make ahead bars are fantastic. You can bake them completely, let them cool, and store them in an airtight container at room temperature for up to 3 days. They’re perfect for potlucks or busy weeks!

Just a heads-up, the nutrition info for these dreamy s’mores cookie bars is an estimate, because, you know, baking can be a bit of an art! Depending on the exact ingredients you use, like the brand of chocolate chips or if you add nuts, the numbers can wiggle a little. But generally, one bar comes in around 350 calories, with about 18g of fat, 45g of carbs, and 4g of protein. Enjoy them guilt-free, knowing you’re indulging in pure happiness!

Alright, now that you’ve hopefully made a batch of these incredible s’mores cookie bars, I’d LOVE to hear all about it! Did they turn out perfectly gooey? Did they disappear in minutes? Drop a comment below and let me know what you thought, or maybe give the recipe a star rating if you feel so inclined! I’m always curious to see how your baking adventures turn out, so feel free to share photos with me too. You can always reach out through my contact page if you have any questions or just want to share your s’mores success story!

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Gooey S’mores Cookie Bars

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Easy s’mores cookie bars with a graham cracker crust, chocolate, and marshmallows. Perfect for parties and potlucks.

  • Author: Leo
  • Prep Time: 20 min
  • Cook Time: 30 min
  • Total Time: 50 min
  • Yield: 24 bars 1x
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Ingredients

Scale
  • 1 cup (2 sticks) unsalted butter, softened
  • 1 cup granulated sugar
  • 1 cup packed light brown sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 3 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 12 ounces semi-sweet chocolate chips, divided
  • 1 cup chopped milk chocolate or chocolate chunks
  • 1 cup marshmallow creme or mini marshmallows
  • 1 cup crushed graham crackers

Instructions

  1. Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
  2. In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
  3. Beat in the eggs one at a time, then stir in the vanilla extract.
  4. In a separate bowl, whisk together the flour, baking soda, and salt.
  5. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
  6. Stir in 8 ounces of the chocolate chips and the chopped milk chocolate.
  7. Press half of the cookie dough evenly into the bottom of the prepared baking pan.
  8. Sprinkle the crushed graham crackers over the dough.
  9. Dollop the marshmallow creme evenly over the graham crackers, or sprinkle with mini marshmallows.
  10. Scatter the remaining 4 ounces of chocolate chips over the marshmallow layer.
  11. Carefully spread the remaining cookie dough over the toppings.
  12. Bake for 25-30 minutes, or until the edges are golden brown and the center is set.
  13. Let the bars cool completely in the pan before cutting into squares.

Notes

  • For cleaner slices, chill the bars in the refrigerator for at least 30 minutes before cutting.
  • You can add other mix-ins like nuts or different types of chocolate.
  • These bars can be made ahead and stored in an airtight container at room temperature for up to 3 days.

Nutrition

  • Serving Size: 1 bar
  • Calories: 350
  • Sugar: 35g
  • Sodium: 150mg
  • Fat: 18g
  • Saturated Fat: 10g
  • Unsaturated Fat: 8g
  • Trans Fat: 0g
  • Carbohydrates: 45g
  • Fiber: 2g
  • Protein: 4g
  • Cholesterol: 50mg

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Hi, I’m Leo Maxwell, and I’m so glad you’re here. For years, my biggest culinary achievement was microwaving leftovers. As a marketing director in Chicago, my life was a blur of deadlines and data, and cooking felt like just another chore. Everything changed on a cross-country road trip. In a tiny New Orleans diner, a plate of shrimp creole tasted more alive than anything I’d ever eaten. It wasn't just food; it was a story. That moment sent me on a new journey—trading my corporate life for a culinary one. Gourmet Gaze is the result of that journey. It’s my place to share recipes that I’ve discovered, tested, and fallen in love with. My food philosophy is simple: cooking should be a joy, not a stress. It should be a feast for the eyes and the soul. Here, you’ll find approachable American recipes, techniques that actually make sense, and a reminder that the best meals are the ones made with a little bit of heart. Let's get cooking!

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