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If you love chocolate, you’re in for a treat! S’mores brownie bars blend gooey brownies, rich chocolate, and toasted marshmallows. This easy recipe will become your go-to dessert. Whether you want a fun family treat or a wow factor for a gathering, these bars fit the bill. Let’s dive into the delicious world of s’mores brownie bars and make your sweet dreams come true!
Why I Love This Recipe
- Decadent Flavor: These brownie bars combine rich chocolate with gooey marshmallows and crunchy graham crackers, creating a perfect s’mores experience.
- Easy to Make: The straightforward steps make this recipe approachable, even for beginner bakers, ensuring that everyone can enjoy these delicious treats.
- Perfect for Sharing: Cut into squares, these bars are ideal for parties, gatherings, or simply sharing with family, making them a crowd-pleaser.
- Customizable: Feel free to add your favorite mix-ins like nuts or swap chocolate types to suit your taste, making this recipe versatile and fun.
Ingredients
To make S’mores Brownie Bars, you need a few basic ingredients. Here’s a list to help you gather everything:
– 1 cup unsalted butter
– 2 cups granulated sugar
– 4 large eggs
– 1 teaspoon vanilla extract
– 1 cup all-purpose flour
– 1 cup unsweetened cocoa powder
– 1/2 teaspoon baking powder
– 1/2 teaspoon salt
– 1 cup semi-sweet chocolate chips
– 1 cup mini marshmallows
– 1 cup graham cracker crumbs
These ingredients create a rich, chocolaty base. The butter and sugar add moisture and sweetness. Eggs help bind everything together. Flour and cocoa give the bars their brownie texture. Baking powder makes them rise, while salt enhances the flavor.
The chocolate chips add melty goodness. Mini marshmallows bring that classic s’mores taste. Finally, graham cracker crumbs offer crunch and a hint of sweetness.
With this mix, you can create a dessert that combines all the joy of s’mores with the richness of brownies. You’ll love how these ingredients work together to make a treat that everyone will enjoy!

Step-by-Step Instructions
Preheat Oven and Prepare Baking Pan
Start by preheating your oven to 350°F (175°C). Grab a 9×13 inch baking pan. Line it with parchment paper, leaving some paper hanging over the edges. This will help you lift out the brownies later.
Melt Butter and Mix with Sugars
In a medium saucepan, melt 1 cup of unsalted butter over low heat. Stir it often until it is completely melted. Once melted, take the pan off the heat. Add 2 cups of granulated sugar and mix until smooth and well blended.
Incorporate Eggs and Vanilla
Now, add 4 large eggs one at a time into the butter-sugar mix. Make sure to mix well after each egg. This step is important for a nice texture. Finally, stir in 1 teaspoon of vanilla extract for some added flavor.
Combine Dry Ingredients
In a separate bowl, mix 1 cup of all-purpose flour, 1 cup of unsweetened cocoa powder, 1/2 teaspoon of baking powder, and 1/2 teaspoon of salt. Whisk them together until they are evenly combined. Gradually add this dry mix to the wet ingredients. Mix gently to avoid overmixing.
Fold in Chocolate Chips
Next, fold in 1 cup of semi-sweet chocolate chips. Make sure they are evenly spread throughout the batter. This will give your brownies that rich chocolate flavor.
Layering and Baking Process
Pour half of the brownie batter into your prepared pan. Use a spatula to spread it evenly. Place the pan in your preheated oven and bake for 20 minutes. After that, take it out and sprinkle 1 cup of graham cracker crumbs over the top. Add 1 cup of mini marshmallows on top of the crumbs.
Cool and Cut the Brownies
Spoon the remaining brownie batter over the marshmallows. Spread it gently to cover them. Return the pan to the oven for another 25-30 minutes. To check if they’re done, use a toothpick. It should come out with moist crumbs, not wet batter. Once baked, let the brownies cool completely in the pan. Use the parchment paper to lift them out and cut into squares for serving.
Tips & Tricks
Perfecting Your Brownie Bars
To make the best s’mores brownie bars, follow these tips:
– Use room temperature ingredients: This helps the butter and eggs mix well.
– Don’t overmix: Mix until just combined. Overmixing can make the brownies tough.
– Layer wisely: Add the graham cracker crumbs and marshmallows evenly. This gives each bite the perfect balance of flavors.
– Check for doneness: Insert a toothpick into the center. It should come out with moist crumbs, not wet batter.
Common Mistakes to Avoid
Here are some common pitfalls:
– Skipping parchment paper: This makes it hard to lift the brownies out. Always line your pan!
– Not cooling completely: Brownies need time to set. If you cut them too soon, they may fall apart.
– Using cold eggs: Cold eggs don’t mix well. Let them sit out for a bit before using.
– Forget to measure: Baking is a science. Measure your ingredients carefully for the best results.
Serving Suggestions
Serve your s’mores brownie bars in style:
– Drizzle chocolate sauce: This adds a rich touch.
– Sprinkle crushed graham crackers: It gives a nice crunch and looks great.
– Add whipped cream: A dollop on the side makes it even more special.
– Pair with ice cream: Vanilla ice cream complements the warm brownies perfectly.
Enjoy these tips for a fun and tasty treat!
Pro Tips
- Butter Temperature: Ensure your butter is at room temperature for easier mixing and a smoother batter.
- Chocolate Chips: For a more decadent flavor, try using a mix of semi-sweet and dark chocolate chips.
- Marshmallow Toasting: For a toasted marshmallow flavor, broil the brownie bars for the last minute of baking, keeping a close eye to prevent burning.
- Cooling Time: Allow the brownies to cool completely before cutting to achieve clean, neat squares.

Variations
Nutty S’mores Brownie Bars
Want to add a crunch? Try nuts! Chopped walnuts or pecans work great. Mix in half a cup of nuts when you fold in the chocolate chips. The nuts give the bars a nice texture and flavor. You can even toast the nuts first for a richer taste.
Gluten-Free Options
Need a gluten-free treat? Swap the all-purpose flour for almond flour or a gluten-free baking mix. Make sure your graham cracker crumbs are gluten-free too. This way, you still get that s’mores flavor without the gluten.
Vegan Substitutions
To make these brownie bars vegan, replace eggs with flax eggs. Mix one tablespoon of flaxseed meal with three tablespoons of water for each egg. Use coconut oil instead of butter. Choose dairy-free chocolate chips and make sure your graham crackers are vegan. These swaps keep the brownies delicious and plant-based!
Storage Info
How to Store S’mores Brownie Bars
Store your S’mores brownie bars in an airtight container. This keeps them fresh and tasty. You can place wax paper between layers to prevent sticking. Keep them at room temperature if you plan to eat them within a few days.
Freezing Instructions
Freezing is a great way to save extras. Cut the brownie bars into squares first. Wrap each square tightly in plastic wrap. Then, place them in a freezer-safe bag. They can last in the freezer for up to three months. When you’re ready to eat, thaw them in the fridge overnight.
Shelf Life and Reheating Tips
S’mores brownie bars last about five days at room temperature. To enjoy them warm, you can reheat in the microwave. Heat for about 15 seconds to start. Check to see if they are warm enough. If not, heat for a few more seconds. Enjoy them with a drizzle of chocolate sauce for a special treat!
FAQs
What is the best way to cut brownie bars?
To cut brownie bars, let them cool completely. Use a sharp knife for clean cuts. You can dip the knife in hot water for easier slicing. Wipe the knife between cuts to avoid messy edges. This keeps the bars neat and pretty.
Can I use different types of chocolate?
Yes, you can use different types of chocolate. Dark chocolate or milk chocolate work well. You can also mix chocolate types to create new flavors. Just remember to keep the ratios similar to the recipe for the best results.
How can I make these brownies more s’mores-like?
To boost the s’mores flavor, add more marshmallows or graham crackers. You can also drizzle some melted chocolate on top for extra sweetness. For a twist, try adding toasted coconut or peanut butter. This adds depth and makes your bars stand out.
What do I do if my brownie bars are too gooey?
If your brownie bars are too gooey, bake them a bit longer. Check them with a toothpick; it should have moist crumbs but not wet batter. If they are still gooey after cooling, they may need more time in the oven next time.
Now you know how to make tasty s’mores brownie bars. We covered the key ingredients, step-by-step instructions, and helpful tips. You can also try fun variations and learn about storage. Remember, mastering these bars is about practice and using the right methods. Enjoy your baking and share these delicious bars with friends or family. You’ll impress everyone with these sweet treats. Keep experimenting to make them your own. Happy bakin
S'mores Brownie Bars
Delicious brownie bars with layers of chocolate, graham crackers, and marshmallows, perfect for a sweet treat.
Prep Time 20 minutes mins
Cook Time 55 minutes mins
Total Time 1 hour hr 15 minutes mins
Course Dessert
Cuisine American
Servings 12
Calories 250 kcal
- 1 cup unsalted butter
- 2 cups granulated sugar
- 4 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1 cup unsweetened cocoa powder
- 0.5 teaspoon baking powder
- 0.5 teaspoon salt
- 1 cup semi-sweet chocolate chips
- 1 cup mini marshmallows
- 1 cup graham cracker crumbs
Begin by preheating your oven to 350°F (175°C). Prepare a 9x13 inch baking pan by lining it with parchment paper, allowing some excess to hang over the edges. This will help you easily lift the brownie bars out after baking.
In a medium saucepan, melt the unsalted butter over low heat, stirring occasionally. Once completely melted, take the saucepan off the heat and stir in the granulated sugar until the mixture is well blended and smooth.
Incorporate the eggs one at a time into the butter-sugar mixture. Be sure to mix well after each addition until fully incorporated. Finally, stir in the vanilla extract for added flavor.
In a separate bowl, combine the all-purpose flour, unsweetened cocoa powder, baking powder, and salt. Whisk the dry ingredients together until they are evenly mixed. Gradually add this dry mixture to the wet ingredients, mixing gently until just combined—be careful not to overmix.
Gently fold in the semi-sweet chocolate chips, ensuring they are evenly distributed throughout the brownie batter.
Carefully pour half of the brownie batter into your prepared baking pan and spread it out evenly with a spatula. Place the pan in the preheated oven and bake for 20 minutes.
After 20 minutes, remove the pan from the oven. Sprinkle the graham cracker crumbs evenly over the baked brownie layer, followed by a layer of mini marshmallows arranged as desired.
Spoon the remaining brownie batter on top of the marshmallows, and use a spatula or spoon to spread it gently and cover as much of the marshmallows as possible.
Return the pan to the oven and continue baking for an additional 25-30 minutes. To check for doneness, insert a toothpick into the center; it should come out with moist crumbs, but not wet batter.
Once baked, allow the brownies to cool completely in the pan. Use the parchment overhang to lift them out, then cut into squares for serving.
For an inviting touch, serve warm with chocolate sauce and crushed graham crackers on top. Add whipped cream or vanilla ice cream on the side for extra indulgence.
Keyword brownies, dessert, s'mores
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