S'mores Brownies from Brownie Mix are gooey, chocolatey, and sure to please everyone. And the best part? Using a brownie mix makes whipping up this treat even easier!
Upgrade your boxed brownies in 7 other ways:
- Cheesecake Brownies from Brownie Mix
- Brookie Bars from Brownie Mix
- Oreo Brownies from Brownie Mix
- Peanut Butter Brownies from Brownie Mix
- Nutty Brownies from Brownie Mix
- Salted Caramel Pretzel Brownies from Brownie Mix
- Birthday Brownies from Brownie Mix
You may also like Chocolate Cake with Ganache Frosting, Salted Chocolate Chunk Shortbread Cookies, M&M Cookies, or Chocolate Crinkle Cookies.
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Ingredients you'll need
For the brownie base
Extra ingredients
Notes and substitutions
- Brownie mix: Use a regular-size (about 18 ounces) boxed brownie.
- Water: Replace with milk, buttermilk, or brewed coffee to add richness and flavor.
- Instant coffee: An optional ingredient that enhances the chocolate flavor and tames the sweetness of the brownies.
Tips for best brownies
- Bring eggs to room temperature and lightly beat them to incorporate them well without overmixing.
- Grease and line the pan with parchment paper to prevent the brownies from sticking.
- To avoid overbaking, check the brownies with a toothpick 2 minutes before they are done. Look for several separate crumbs for fudgy brownies and less for cakey brownies.
- Cool the brownies before slicing. Refrigerating them improves their texture.
How to make this recipe
Step 1: Make the brownie batter and combine most of the graham cracker pieces (about 6 pieces) into the batter.
Step 2: Spread it evenly on a 9x9-inch pan.
Step 3: Bake the brownies according to the package instructions.
Step 4: Add 2 cups of marshmallows and the remaining graham crackers on top.
Step 5: Broil it on low until marshmallows are lightly toasted, about 2 minutes. Watch it closely as you do this. While still hot, top with 1 chocolate bar.
Let the brownies set for at least an hour in the fridge before cutting. Refrigerate leftovers and consume them within 5 to 7 days.
Recipe FAQs
Yes, but be careful not to overmix the batter. Cold eggs won't ruin your brownies, but eggs at room temperature will blend evenly with other ingredients.
A neutral-flavored oil is best for baking, such as canola or other vegetable oils. Mild-tasting oils like avocado oil, olive oil, and coconut oil can also be used.
Yes! You can easily double this recipe and bake it in a 9x13-inch pan.
More about brownies
If you'd like to know more, here are frequently asked questions on box brownies, including extra tips, troubleshooting, and more.
Other cakes and baked desserts you may like
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📖 Recipe
S'mores Brownies From Brownie Mix
Equipment
- 9x9-inch pan
Ingredients
For the brownie base (see package)
- brownie mix about 18 ounces
- eggs room temp & lightly beaten
- water sub:milk, buttermilk, or coffee
- oil (canola, olive, or other vegetable oils)
- ½ teaspoon instant coffee or ¼ teaspoon espresso powder optional
For the s'mores
- 8 graham crackers cut into small pieces; divided
- 2 cups marshmallows
- 1 chocolate bar cut into small pieces
Instructions
- Make the brownie batter and combine most of the graham cracker pieces (about 6 pieces) into the batter.
- Spread it evenly on a 9x9-inch pan.
- Bake the brownies according to the package instructions.
- Add the marshmallows and remaining graham crackers on top.
- Broil it on low until marshmallows are lightly toasted, about 2 minutes. Watch it closely as you do this.
- While still hot, top with chocolate pieces.
- Let it set for at least an hour in the fridge before cutting.
Notes
- Bring eggs to room temperature and lightly beat them to incorporate them well without overmixing.
- Grease and line the pan with parchment paper to prevent the brownies from sticking.
- To avoid overbaking, check the brownies with a toothpick 2 minutes before they are done. Look for several separate crumbs for fudgy brownies and less for cakey brownies.
- Cool the brownies before slicing. Refrigerating them improves their texture.
Gwen says
Can I use marshmallow fluff instead of mini marshmallows?
Nora Reyes says
Hi Gwen! Yes, you can, but it works a little differently. Marshmallow fluff melts much faster and spreads, so it’s best to dollop it on top during the last few minutes of baking or swirl it in gently, rather than adding it from the start. Mini marshmallows hold their shape better, but fluff will still give you that gooey marshmallow layer. 😊😊😊
Jen says
Wow! This is mouthwatering!
Nora Rey says
Thank you! 😊 If you decide to try them out, I hope you enjoy every bite! Feel free to reach out anytime if you need help.