Fudgy Marshmallow Brownies
There’s something truly magical about biting into a fudgy brownie, especially when it’s topped with a layer of gooey marshmallows. These Fudgy Marshmallow Brownies bring together the rich, chocolatey goodness of brownie mix and the sweet, fluffy goodness of marshmallows, creating a dessert that’s perfect for any occasion. Whether you’re looking for a delightful treat to bring to a party or a comforting dessert to enjoy at home, this recipe will surely satisfy your sweet tooth.
Why This Fudgy Marshmallow Brownies Stands Out
These Fudgy Marshmallow Brownies are not your run-of-the-mill brownies. The combination of a dense, fudgy base with a sweet, pillowy marshmallow topping creates a delightful contrast in textures. Each bite offers a rich chocolate flavor that is perfectly balanced by the lightness of the marshmallows. Additionally, the chocolate chips sprinkled throughout the brownies add pockets of melted chocolate that enhance the overall experience. This dessert is a crowd-pleaser and is sure to impress family and friends alike.
What’s in the Bowl
To whip up these delectable Fudgy Marshmallow Brownies, you’ll need the following ingredients:
- 1 package (18.3 oz) Betty Crocker Fudge Brownie Mix – The foundation of our brownies, providing rich chocolate flavor.
- 2 cups marshmallows – For that gooey, sweet topping that takes the brownies to the next level.
- 6 tablespoons half and half – Adds creaminess to the batter for a rich texture.
- 6 tablespoons butter – Enhances the fudginess of the brownies.
- 1 1/2 cups white sugar – Sweetens the brownies and helps achieve that perfect texture.
- 1/2 cup chocolate chips – Melts into the brownies, providing extra chocolatey goodness.
Kitchen Gear Checklist
Before diving into the baking process, make sure you have the following kitchen gear ready:
- Mixing bowl – For combining all your ingredients.
- Whisk or spatula – To mix the batter smoothly.
- 9×13 inch baking pan – The perfect size for these brownies.
- Measuring cups and spoons – For precise ingredient measurements.
- Oven mitts – Safety first when handling hot pans!
- Cooling rack – To let your brownies cool evenly.
From Start to Finish: Fudgy Marshmallow Brownies

Making these Fudgy Marshmallow Brownies is a straightforward process that yields delicious results. Follow these simple steps:
Step 1: Preheat Your Oven
Preheat your oven to 350°F (175°C). This ensures that your brownies bake evenly and perfectly.
Step 2: Prepare the Baking Pan
Grease your 9×13 inch baking pan with a bit of butter or line it with parchment paper for easy removal later.
Step 3: Mix the Brownie Batter
In a large mixing bowl, combine the Betty Crocker Fudge Brownie Mix, white sugar, half and half, and melted butter. Use a whisk or spatula to mix until just combined. Avoid overmixing for the fudgiest texture.
Step 4: Fold in the Chocolate Chips
Gently fold in the chocolate chips into the brownie batter. This will create delicious pockets of melted chocolate when baked.
Step 5: Pour and Spread the Batter
Pour the brownie batter into the prepared baking pan. Use a spatula to spread it evenly across the pan.
Step 6: Bake the Brownies
Place the pan in the preheated oven and bake for about 25-30 minutes. The brownies should look set but still slightly underbaked in the center.
Step 7: Add the Marshmallows
Remove the brownies from the oven and immediately sprinkle the marshmallows on top. Return the pan to the oven and bake for an additional 5-10 minutes, or until the marshmallows are golden and gooey.
Step 8: Cool and Slice
Allow the brownies to cool in the pan on a cooling rack. Once cooled, slice into squares and serve.
In-Season Flavor Ideas

These Fudgy Marshmallow Brownies are delicious as they are, but you can always switch things up with these seasonal flavor ideas:
- Mint chocolate – Add a few drops of peppermint extract for a refreshing twist.
- Peanut butter – Swirl in some creamy peanut butter before baking for a rich, nutty flavor.
- Cherry – Fold in some maraschino cherries for a fruity surprise.
- Orange zest – Add zest from an orange for a citrusy brightness.
Steer Clear of These
When making Fudgy Marshmallow Brownies, there are a few things to avoid to ensure the best results:
- Don’t overmix the batter, as this can lead to a cakey texture instead of fudgy.
- Avoid using expired brownie mix or ingredients, as this can affect the taste and texture.
- Don’t skip the cooling step; cutting into warm brownies can make them fall apart.
- Refrain from baking at too high a temperature, as this can burn the marshmallows while leaving the brownies undercooked.
Save It for Later
If you find yourself with leftover Fudgy Marshmallow Brownies, here are some tips to store them:
You can store brownies in an airtight container at room temperature for up to 3 days. For longer storage, place them in the refrigerator for up to a week. You can also freeze brownies for up to 3 months. Just be sure to wrap them tightly in plastic wrap and place them in a freezer-safe container. When you’re ready to enjoy, simply thaw them at room temperature.
Ask & Learn
Can I use a different brownie mix?
Yes! While we recommend the Betty Crocker Fudge Brownie Mix for its rich flavor and texture, you can use any brownie mix you prefer. Just adjust the baking time according to the instructions on the package.
What can I substitute for half and half?
If you don’t have half and half on hand, you can use a combination of milk and heavy cream or simply use whole milk for a lighter option. Just remember that the texture may vary slightly.
Can I add nuts to the brownies?
Absolutely! Chopped walnuts or pecans would add a delicious crunch to the fudgy brownies. Mix them in along with the chocolate chips for a delightful texture contrast.
How do I know when my brownies are done baking?
The edges should look set, and a toothpick inserted into the center should come out with a few moist crumbs attached, but not wet batter. Remember, the brownies will continue to cook slightly after being removed from the oven.
If you enjoyed making these Fudgy Marshmallow Brownies, consider trying out these other delightful recipes:
Serve & Enjoy
Now that your Fudgy Marshmallow Brownies are ready, it’s time to serve them up! Whether you enjoy them warm with a scoop of ice cream or at room temperature with a cup of coffee, these brownies are a treat that everyone will love. Don’t forget to share them with friends and family, because desserts are always better when enjoyed together. Happy baking!

Fudgy Marshmallow Brownies
Ingredients
- 1 package Betty Crocker Fudge Brownie Mix 18.3 oz
- 2 cups marshmallows
- 6 tablespoons half and half
- 6 tablespoons butter melted
- 1 1/2 cups white sugar
- 1/2 cup chocolate chips
Instructions
- Preheat your oven to 350°F (175°C). This ensures that your brownies bake evenly and perfectly.
- Grease your 9x13 inch baking pan with a bit of butter or line it with parchment paper for easy removal later.
- In a large mixing bowl, combine the Betty Crocker Fudge Brownie Mix, white sugar, half and half, and melted butter. Use a whisk or spatula to mix until just combined. Avoid overmixing for the fudgiest texture.
- Gently fold in the chocolate chips into the brownie batter. This will create delicious pockets of melted chocolate when baked.
- Pour the brownie batter into the prepared baking pan. Use a spatula to spread it evenly across the pan.
- Place the pan in the preheated oven and bake for about 25-30 minutes. The brownies should look set but still slightly underbaked in the center.
- Remove the brownies from the oven and immediately sprinkle the marshmallows on top. Return the pan to the oven and bake for an additional 5-10 minutes, or until the marshmallows are golden and gooey.
- Allow the brownies to cool in the pan on a cooling rack. Once cooled, slice into squares and serve.
Equipment
- Mixing Bowl
- Whisk or spatula
- 9x13 inch baking pan
- Measuring Cups and Spoons
- Oven mitts
- Cooling Rack
Notes
- Store brownies in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.
- Freeze brownies for up to 3 months, wrapped tightly to preserve freshness.
- For a twist, add peppermint extract, peanut butter, cherries, or orange zest to the batter before baking.

