Easy Brownies with Box Mix
Lazy girl s’mores brownies are the ultimate treat for anyone looking to satisfy their sweet tooth with minimal effort. This delightful dessert combines the rich, fudgy taste of brownies with the nostalgic flavors of a classic campfire s’more. Imagine thick layers of melted chocolate topped with gooey marshmallows, all resting on a graham cracker crust. It’s a glorious blend that’s sure to impress anyone who takes a bite. Even better? They’re made with a simple box of brownie mix, making them a breeze to whip up.
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The beauty of these brownies lies in their simplicity and the fact that they cater to cravings for comfort food. Whether you’re having a movie night with friends, hosting a casual gathering, or just indulging on a cozy evening at home, these brownies are perfect for the occasion. Plus, with golden marshmallows and chocolate that oozes deliciousness, every bite feels like a gourmet experience. I’m excited for you to try out this recipe! Here’s how to make it happen.
Why You’ll Love This Recipe
- Simple & Quick: With just a few steps and about an hour, you can have these mouth-watering brownies ready.
- Irresistible Flavor: The combination of chocolate, graham crackers, and toasted marshmallows makes for a flavor explosion.
- Eye-Catching Appeal: The layered look with toasted marshmallows really catches the eye; it’s a fun dessert to serve!
- Flexible Serving: Great for parties, snacks, or even as a sweet breakfast treat on lazy Sundays.
- Diet-Friendly Options: You can swap in gluten-free brownie mix or dairy-free chocolate chips for a crowd-pleasing treat that accommodates various diets.
Ingredients You’ll Need
- 5 graham cracker sheets: These provide a base and give that classic s’mores flavor. You can substitute with gluten-free cracker options if needed.
- 1 box of brownie mix for an 8×8 inch pan: This simplifies the process—just follow the instructions on the box for the best results.
- 2 egg yolks: We use egg yolks for a rich, fudgy texture. Don’t toss those whites; they can be used in other recipes!
- 1/2 cup vegetable oil or melted butter: Either works well for richness; use melted butter for a more buttery flavor.
- 1/3 cup brewed hot coffee: This enhances the chocolate flavor and makes the brownies more complex. You can skip coffee if preferred, but consider adding a bit more water.
- 1 tsp vanilla extract: Essential for rounding out the flavors; choose pure vanilla for better quality.
- 1/4 tsp salt: Just a pinch elevates all the flavors; don’t skip it!
- 1/2 cup chocolate chips: For some extra chocolate goodness; use semi-sweet for a classic combination or milk chocolate for a sweeter version.
- 2 cups mini marshmallows: They melt to create that s’mores charm. If you prefer, you can use larger marshmallows but cut them down to size.
How to Make Easy Brownies with Box Mix
- Preheat the oven and prepare the pan: Preheat your oven to 325°F (160°C). Line the bottom of an 8×8-inch baking pan with parchment paper or aluminum foil, allowing some overhang for easy removal later.
- Layer the graham crackers: Arrange the graham cracker sheets on the bottom of the pan in a single layer, breaking them as necessary to cover the entire surface evenly.
- Mix the brownie batter: In a large mixing bowl, combine the brownie mix, 2 egg yolks, 1/3 cup brewed hot coffee, 1/2 cup vegetable oil (or melted butter), 1 tsp vanilla extract, and 1/4 tsp salt. Stir until just combined, then gently fold in 1/2 cup chocolate chips.
- Bake the brownies: Pour the brownie batter evenly over the graham cracker layer in your prepared pan. Bake for about 40 minutes or until the edges are set and a toothpick inserted in the center comes out with a few moist crumbs.
- Add the marshmallows: Carefully pull the brownies out and top them with 2 cups of mini marshmallows. Return them to the oven and bake for an additional 3-4 minutes, or until the marshmallows are puffed and slightly golden.
- Toast the marshmallows: Once the marshmallows are ready, remove the brownies from the oven. Using a kitchen torch, toast the marshmallows for that perfect golden-brown finish. If you don’t have a torch, place the pan under the broiler for a few minutes—just don’t walk away, or they might burn!
- Cool and slice: Let the brownies cool down completely before slicing. For easier cutting, use a knife dipped in hot water, then dried off.
Storing & Reheating
To keep your brownies fresh, store them at room temperature in a sealed container for up to 3 days. For longer storage, you can refrigerate them for up to a week in an airtight container, or freeze them for up to 3 months. To reheat, place the brownies in the microwave for about 10-15 seconds, just enough to warm them through. Keep in mind they might lose some gooeyness when stored, but a quick zapping will bring some of that magic back!
Chef’s Helpful Tips
- Ensure all your ingredients are at room temperature for the best texture.
- Avoid overmixing the batter after adding the chocolate chips—this keeps the brownies fudgy.
- Don’t bake them past the recommended time; they should be soft in the middle and only slightly firm around the edges.
- For next-level flavor, add a sprinkle of sea salt on top before serving to balance the sweetness.
- Consider adding layers of caramel or nuts to the brownie batter for added flavor variations.
It’s always a joy to create something delicious that’s easy enough to whip up on a whim. These brownies are not just a treat but also a reminder of the sweet moments in life, reminding us of campfires and good company. You can experiment with this recipe—try different types of chips, add colorful sprinkles, or even drizzle on some chocolate sauce for an extra indulgence.

Recipe FAQs
Can I use different types of chocolate chips?
Absolutely! Feel free to mix and match chocolate chip varieties. You can use white chocolate chips, dark chocolate chips, or even flavored chips like peanut butter for an unexpected twist.
How do I store leftover brownies?
Store any leftover brownies in an airtight container at room temperature for up to three days. If you want to keep them longer, refrigerate them for about a week or freeze them for up to three months.
Can I make these brownies without coffee?
Yes, you can omit the coffee if you prefer. Just replace it with an equal amount of water. However, the coffee enhances the chocolate flavor, so if you’re a fan of rich chocolate, you might want to keep it in.
What should I do if my marshmallows burn while toasting?
If your marshmallows start to burn too quickly under the broiler, immediately remove them from the oven and reduce the broiler setting. You can also cover them loosely with foil to slow down the toasting.
These easy brownies with box mix are sure to become a favorite in your kitchen. Enjoy the baking experience and the delightful outcomes they bring!
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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 deliciously rich with layers of graham crackers and mini marshmallows. Perfect for a quick dessert or snack, this recipe features simple ingredients like brownie mix, egg yolks, and chocolate chips, making it an ideal treat for chocolate lovers looking for an easy homemade option.
Ingredients
- 5 graham cracker sheets
- 1 box of brownie mix for an 8×8 inch pan
- 2 egg yolk
- 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 the bottom of an 8×8 inch baking pan with parchment paper or aluminum foil, leaving an overhang for easy removal.
- Arrange the graham cracker sheets in a single layer at the bottom of the pan, breaking them if necessary to cover the surface.
- In a large bowl, combine the brownie mix, egg yolks, hot brewed coffee, vegetable oil, vanilla extract, and salt. Gently fold in the chocolate chips.
- Pour the brownie batter over the graham crackers in the prepared pan and bake for 40 minutes.
- Remove the brownies from the oven and add the mini marshmallows on top. Return to the oven and bake for an additional 3-4 minutes.
- Once done, use a kitchen torch to toast the marshmallows on top. Let the brownies cool completely before slicing.
Notes
Toast the marshmallows for a delicious campfire flavor.
Use butter instead of vegetable oil for a richer taste.
Let the brownies set for at least 20 minutes before slicing for cleaner pieces.
Nutrition
- Serving Size: 1 brownie
- Calories: 200
- Sugar: 15g
- Sodium: 150mg
- Fat: 8g
- Saturated Fat: 2g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 29g
- Fiber: 1g
- Protein: 2g
- Cholesterol: 30mg
