Easy Brownies with Box Mix
Lazy girl s’mores brownies bring together the nostalgic flavors of campfire s’mores and rich chocolate brownies into a delightful dessert that’s as easy to make as it is to enjoy. If you’re craving gooey chocolate and toasted marshmallows, this recipe ticks all the boxes, making your sweet tooth smile. The chocolatey body of the brownie pair perfectly with the crunch of graham crackers, followed by the rich hit of melted chocolate chips and the delightful surprise of mini marshmallows on top. It’s a simple yet decadent treat that feels special without requiring all day in the kitchen.
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When I first made these brownies, it was one of those moments filled with simultaneous excitement and a bit of trepidation. Would my friends love them? Spoiler alert: they did! The way the marshmallows puffed up and turned golden brown topped off the rich chocolate flavor in the best possible way. These brownies are truly a crowd-pleaser and perfect for any occasion — be it a cozy night in, a potluck with friends, or a weekend family gathering. I promise these brownies will become a favorite in no time, and they’re so easy to whip up that you may just find yourself making them every week!
Why You’ll Love This Recipe
- Simple & Quick: Perfect for a last-minute sweet craving and ready to eat in about an hour!
- Irresistible Flavor: The combination of chocolate, marshmallows, and graham crackers hits all the right notes.
- Eye-Catching Appeal: Who can resist the charm of gooey toasted marshmallows sitting atop chocolate brownies?
- Flexible Serving: These brownies are great for snacks, parties, or even breakfast, if you’re feeling adventurous!
- Diet-Friendly Options: Easily adaptable for gluten-free diets with the right brownie mix.
Ingredients You’ll Need
- 5 graham cracker sheets: These provide the crunchy base that adds a delightful texture to the brownies.
- 1 box of brownie mix for an 8×8 inch pan: A convenient way to have a rich brownie flavor without the fuss of making it from scratch.
- 2 egg yolks: They help create a fudgy texture that keeps the brownies moist.
- 1/2 cup vegetable oil or melted butter: Gives the brownies their richness; choose butter for a more decadent flavor.
- 1/3 cup brewed hot coffee: Coffee enhances the chocolate flavor, making the brownies taste deeply chocolaty.
- 1 tsp vanilla extract: This adds a warm, inviting flavor that complements the chocolate.
- 1/4 tsp salt: Just a pinch enhances the flavors and balances the sweetness.
- 1/2 cup chocolate chips: These melt into gooey pockets of chocolate, bringing extra indulgence.
- 2 cups mini marshmallows: They are the star of the show, toasting beautifully for a nostalgic s’mores experience.
How to Make Easy Brownies with Box Mix
- Preheat the Oven: Start by preheating your oven to 325°F (160°C). Line the bottom of your 8×8 inch baking pan with parchment paper or aluminum foil, allowing some overhang for easy removal later.
- Prepare the Graham Crackers: Lay the graham cracker sheets flat on the bottom of the pan, fitting them snugly together. You might need to break a few pieces to fill any gaps.
- Mix the Brownie Batter: In a large mixing bowl, combine the brownie mix with 2 egg yolks, 1/2 cup of vegetable oil (or melted butter), 1/3 cup of brewed hot coffee, 1 tsp of vanilla extract, and 1/4 tsp of salt. Stir until smooth and creamy, then gently fold in the 1/2 cup of chocolate chips.
- Add the Brownie Batter: Pour the batter evenly over the layer of graham crackers in the prepared pan, smoothing the top if necessary.
- Bake the Brownies: Place the pan in the oven and bake the brownies for about 40 minutes or until a toothpick inserted into the center comes out clean with just a few moist crumbs attached.
- Top with Mini Marshmallows: Once the brownies are baked, remove the pan and carefully sprinkle the 2 cups of mini marshmallows on top. Return the pan to the oven for an additional 3-4 minutes to let the marshmallows soften and puff up.
- Toast the Marshmallows: For a deliciously toasted effect, use a kitchen torch to carefully toast the marshmallows until they’re golden brown. If you don’t have a torch, simply place the pan under the broiler, keeping a watchful eye on it to prevent burning.
- Cool and Slice: Allow the brownies to cool completely before lifting them out of the pan using the overhang. Slice them into squares, and enjoy!
Storing & Reheating
Store your brownies in an airtight container at room temperature for up to 4 days. For longer storage, keep them in the refrigerator, where they can last up to a week. You can also freeze them for up to three months. Just wrap individual brownies tightly in plastic wrap, then place them in a freezer-safe bag. To reheat, microwave for 10-15 seconds until warm but be careful, as this can affect the texture. It’s best to enjoy them fresh for maximum gooeyness!
Chef’s Helpful Tips
- Keep an eye on your brownies as they bake. Ovens can vary, so check them a few minutes before the timer goes off!
- Want a little extra gourmet flavor? Try adding chopped nuts or a swirl of caramel in the brownie batter before baking.
- For a beautifully clean cut, use a sharp knife dipped in hot water for slicing the brownies. Wipe the knife clean between cuts for the best results.
- If you prefer a slightly firmer brownie texture, add a little less oil or butter.
Now, go ahead and get baking! Each bite of these easy brownies with box mix will be an indulgent delight. Perfectly chewy and slightly toasted marshmallows combine with that rich brownie flavor, making them utterly irresistible.

Recipe FAQs
Can I make these brownies gluten-free?
Absolutely! You can use a gluten-free brownie mix, and it will work just as wonderfully in this recipe. The graham crackers will also need to be gluten-free to ensure the entire dessert is safe for those with gluten sensitivities.
How do I tell when the brownies are done?
Check for doneness around the 35-40 minute mark, depending on your oven. The edges should look set, and a toothpick inserted in the center should come out with a few moist crumbs.
What can I use instead of chocolate chips?
If you’re looking for alternatives, you could use white chocolate chips, peanut butter chips, or even chunks of your favorite candy bar for a fun twist! Just make sure whatever you choose melts well.
How do I store leftovers?
Once they’ve cooled, store any leftovers in an airtight container at room temperature for up to four days. If you want to keep them longer, consider freezing them as mentioned above. Enjoy your easy brownies with box mix as part of any treat moment!
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📖 Recipe Card

Easy Brownies with Box Mix
- Prep Time: 10 minutes
- Cook Time: 43 minutes
- Total Time: 53 minutes
- Yield: 16 servings 1x
- Category: Desserts
- Method: Baking
- Cuisine: American
Description
These Easy Brownies with Box Mix are a delightful treat combining rich chocolate flavor with a touch of coffee. They’re perfect for any occasion, delivering simple preparation and mouthwatering taste. Treat your friends or family to these homemade desserts anytime.
Ingredients
- 5 graham cracker sheets
- 1 box of brownie mix for an 8×8 inch pan
- 2 egg yolks
- 1/2 cup vegetable oil or melted butter
- 1/3 cup brewed hot coffee
- 1 tsp vanilla extract
- 1/4 tsp salt
- 1/2 cup chocolate chips
- 2 cups mini marshmallows
Instructions
- Preheat the oven to 325°F and line an 8×8 inch baking pan with parchment paper or aluminum foil, leaving an overhang on the sides.
- Arrange the graham cracker sheets in a single layer at the bottom of the pan, breaking them as needed to fit.
- Mix the brownie mix, egg yolks, hot brewed coffee, vegetable oil or melted butter, vanilla extract, and salt in a large bowl. Fold in the chocolate chips.
- Pour the brownie batter over the graham crackers evenly and bake in the preheated oven for 40 minutes.
- Remove from the oven and carefully top with mini marshmallows. Return to the oven for another 3-4 minutes.
- After baking, use a kitchen torch to toast the marshmallows. Allow the brownies to cool completely before slicing.
Notes
For easier slicing, let the brownies cool thoroughly before cutting.
Feel free to adjust the amount of chocolate chips based on your preference.
Adding nuts can enhance the texture for a delightful crunch.
Nutrition
- Serving Size: 1 brownie
- Calories: 200
- Sugar: 12g
- Sodium: 150mg
- Fat: 10g
- Saturated Fat: 3g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 26g
- Fiber: 1g
- Protein: 2g
- Cholesterol: 15mg
