S’mores Brownies with Vanilla Bean Marshmallow bring all the cozy campfire vibes into your kitchen. A fudgy chocolate brownie base is studded with crunchy graham crackers and milk chocolate, then topped with a pillow-soft vanilla bean marshmallow layer that sets into fluffy clouds. Every bite balances rich cocoa, crackling cracker bits, and sweet, aromatic vanilla bean sweetness, making this dessert an irresistible showstopper for gatherings or solo indulgence. Give it a try—you’ll be hooked from the very first gooey mouthful!
Key Ingredients
Before you dive in, let’s meet the stars of this recipe and see how each one contributes to the perfect s’mores brownie.
- 1 cup unsalted butter: Creates a rich, silky base that keeps the brownies moist and tender.
- 8 ounces semisweet chocolate, chopped: Melts into a deep cocoa flavor and glossy texture when combined with butter.
- 1 1/2 cups granulated sugar: Sweetens the batter and helps achieve that fudgy crumb.
- 1/2 cup brown sugar, packed: Adds a hint of caramel depth and extra chewiness.
- 4 large eggs: Bind ingredients and give structure, while creating a tender crumb.
- 2 teaspoons vanilla extract: Enhances the chocolate notes and ties flavors together.
- 1 cup all-purpose flour: Provides the framework for the fudgy texture without making it cakey.
- 1/2 cup unsweetened cocoa powder: Delivers intense chocolate intensity and a velvety finish.
- 1/2 teaspoon salt: Balances sweetness and intensifies the chocolate flavor.
- 1 cup graham cracker pieces: Brings that classic s’mores crunch and subtle honey flavor.
- 4 ounces milk chocolate, broken into pieces: Melts into pockets of creamy sweetness throughout the bake.
- 3 envelopes unflavored gelatin: Sets the marshmallow layer into pillowy peaks.
- 1/2 cup cold water: Blooms the gelatin for a stable, fluffy marshmallow.
- 1 cup granulated sugar: Turns into a soft-ball stage syrup for perfect marshmallow texture.
- 1/2 cup light corn syrup: Prevents sugar crystallization and yields a glossy, smooth marshmallow.
- 1/4 cup water: Dilutes the sugar syrup and helps control temperature.
- 1 vanilla bean, split and seeds scraped: Infuses the marshmallow with delicate, aromatic vanilla flecks.
- 2 teaspoons pure vanilla extract: Rounds out the marshmallow’s flavor once the heat is off.
- 2 large egg whites: Whipped into stiff peaks to create that airy, cloud-like marshmallow.
- 1/4 teaspoon salt: Stabilizes the egg whites and enhances sweetness.
How To Make S’mores Brownies with Vanilla Bean Marshmallow
This recipe combines classic brownie baking with candy-making techniques for homemade marshmallows. You’ll start by melting chocolate and butter, whisking in sugars, eggs, and vanilla, then folding in dry ingredients for a fudgy base. After baking and cooling, you’ll bloom gelatin, cook a hot sugar syrup to soft-ball stage, and whip it into glossy marshmallow before layering it on the brownies. Here’s how to bring it all together step by step:
1. Preheat your oven to 350°F (175°C) and line a 9×13-inch baking pan with parchment paper, letting excess hang over the edges for easy removal.
2. Place butter and chopped semisweet chocolate in a heatproof bowl set over simmering water, stirring until completely melted and smooth.
3. Remove the bowl from heat and vigorously whisk in 1½ cups granulated sugar and ½ cup packed brown sugar until no streaks remain.
4. Crack in the eggs one at a time, whisking thoroughly after each addition to ensure a glossy, uniform batter, then mix in 2 teaspoons vanilla extract.
5. Sift together 1 cup flour, ½ cup cocoa powder, and ½ teaspoon salt; gently fold into the chocolate batter until just combined—avoid overmixing.
6. Pour the thick batter into your prepared pan, using an offset spatula to smooth the top into an even layer.
7. Sprinkle 1 cup graham cracker pieces and 4 ounces milk chocolate pieces over the surface, pressing down lightly so they adhere.
8. Bake for 20–25 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs—this ensures fudgy brownies.
9. Cool the brownies completely in the pan on a wire rack; this prevents the marshmallow from sliding off.
10. While the brownies cool, bloom the gelatin by sprinkling 3 envelopes over ½ cup cold water in a small bowl; set aside until spongy.
11. In a medium saucepan, combine 1 cup granulated sugar, ½ cup corn syrup, and ¼ cup water; heat over medium-high until the mixture reaches 240°F (115°C) on a candy thermometer.
12. Split the vanilla bean lengthwise, scrape the seeds into the hot syrup, then remove from heat and stir in 2 teaspoons pure vanilla extract.
13. In a stand mixer fitted with the whisk attachment, beat 2 egg whites and ¼ teaspoon salt on medium speed until soft peaks form.
14. With the mixer on medium-high, slowly pour the hot sugar syrup down the side of the bowl, whisking continuously until the mixture is thick and glossy.
15. Add the bloomed gelatin to the mixer and continue beating until the marshmallow holds stiff peaks.
16. Spread the vanilla bean marshmallow evenly over the cooled brownies using an offset spatula, making sure to reach each edge.
17. Let the marshmallow layer set at room temperature for at least 2 hours before slicing into squares.
Serving Suggestions
Once your s’mores brownies are ready, presentation can make them even more delightful. Here are four ways to serve them so each bite feels extra special:
- Warm with ice cream: Gently reheat a brownie square in the microwave for 10 seconds, then top with a scoop of cold vanilla or chocolate ice cream.
- Berry garnish: Arrange fresh raspberries or strawberries alongside each brownie to add a pop of tartness and color.
- Chocolate drizzle: Melt extra semisweet chocolate and drizzle thin streams over the marshmallow layer for added decadence.
- Rustic platter: Serve on a wooden cutting board with extra graham cracker crumbs and chocolate pieces scattered around for a campfire-inspired display.
Tips For Perfect S’mores Brownies with Vanilla Bean Marshmallow
Nailing both a fudgy brownie and a silky marshmallow takes a bit of practice, but these friendly pointers will have you slicing perfect squares every time. Keep your candy thermometer close, don’t rush the cool-down, and you’ll impress everyone at the table!
- Use a candy thermometer for the sugar syrup to hit exactly 240°F, ensuring the marshmallow sets with the right chewy-yet-airy texture.
- For a toasted finish, switch your oven to broil and gently toast the marshmallow layer for about 10 seconds—watch closely so it turns golden, not burnt.
- Store brownies in an airtight container at room temperature for up to 2 days; this keeps the crust crisp and the marshmallow soft.
- If desired, sprinkle extra graham cracker crumbs on top of the marshmallow right after spreading for added crunch and visual appeal.
How To Store It
Proper storage will preserve both the gooey brownie base and pillowy marshmallow top, so every bite tastes just as heavenly as day one. Follow these methods to keep your dessert fresh:
- Room temperature: Keep brownies in an airtight container on the countertop for up to 2 days. This prevents condensation and preserves the marshmallow texture.
- Avoid refrigeration: Chilling can introduce moisture, making the graham crackers and brownies soggy—better to enjoy within two days.
- Freezing: Wrap individual squares in plastic wrap, then foil; freeze for up to one month. Thaw at room temperature before serving.
- Reheating: To revive the gooey center, microwave a slice for 5–7 seconds, then press the back of a spoon onto the marshmallow to lift it back to its fluffy glory.
Frequently Asked Questions
Got questions? Here are answers to the most common queries about these campfire-inspired brownies!
- Q: How long does it take to prepare and assemble the S’mores Brownies with Vanilla Bean Marshmallow?
A: Total time is about 4 hours. Prep and mixing take roughly 30 minutes. Baking requires 20–25 minutes, plus about 30–60 minutes for the brownies to cool completely. Making the marshmallow takes 20 minutes, and then it needs at least 2 hours at room temperature to set before slicing.
- Q: How can I ensure the vanilla bean marshmallow sets properly?
A: Bloom the gelatin by sprinkling it over ½ cup cold water and letting it stand until it swells. Use a candy thermometer to heat the sugar, corn syrup, and water to exactly 240°F before pouring it into whipped egg whites. After adding the bloomed gelatin, beat until stiff peaks form, then spread immediately over cooled brownies. Allow 2 hours at room temperature for the marshmallow to stabilize.
- Q: My brownies came out too gooey or too dry. What should I adjust?
A: For fudgier brownies, reduce bake time by 2–3 minutes, ensuring you still see a few moist crumbs on a toothpick. For firmer brownies, extend baking by 2–3 minutes. Always allow the brownies to cool fully in the pan; cutting them warm can make them seem underbaked or too moist.
- Q: Can I replace the vanilla bean if I don’t have one on hand?
A: Yes. Omit the vanilla bean and add an extra teaspoon of pure vanilla extract directly to the hot sugar syrup. Be sure to stir it in after removing the pan from heat to preserve the extract’s aroma.
- Q: Is it necessary to use a candy thermometer, and what if I don’t have one?
A: A candy thermometer ensures you reach the soft-ball stage (240°F), which is critical for marshmallow structure. Without one, boil the syrup until it drips from a spoon in a thread that holds its shape briefly before falling—a less precise method that can still work but risks under- or overcooking.
- Q: How should I store leftover brownies and how long will they keep?
A: Store cooled brownies in an airtight container at room temperature for up to 2 days. The marshmallow layer will soften slightly over time but remain stable. Avoid refrigeration, as moisture can make the graham crackers and brownie layer soggy.
- Q: Can I add extra crunch or a toasted finish to the marshmallow layer?
A: For extra crunch, sprinkle additional graham cracker crumbs over the marshmallow immediately after spreading. Toasting can be done by briefly broiling the marshmallow for about 10 seconds—watch closely to avoid scorching and yield a golden, slightly crisp top.
What Makes This Special
These S’mores Brownies with Vanilla Bean Marshmallow aren’t just a dessert—they’re a minis’mores party in every bite! The fudgy brownie base studded with graham crackers and melty milk chocolate perfectly complements the fluffy, homemade vanilla bean marshmallow. The contrast of textures and flavors mimics that campfire taste you love, right on your countertop. Feel free to print this recipe and save it for cozy nights ahead, and drop a comment if you have questions or share your delicious success stories—I’d love to hear how your marshmallow masterpiece turns out!
S’mores Brownies with Vanilla Bean Marshmallow
Description
Fudgy brownies studded with crunchy graham crackers and melted chocolate meet a pillow-soft vanilla bean marshmallow layer. Each bite blends rich cocoa, crackling cracker bits, and sweet, fluffy marshmallow clouds.
Ingredients
Instructions
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Preheat oven to 350°F (175°C). Line a 9x13-inch baking pan with parchment paper.
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In a heatproof bowl set over simmering water, melt butter and chopped semisweet chocolate until smooth.
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Remove from heat and whisk in 1 1/2 cups granulated sugar and brown sugar until combined.
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Add eggs one at a time, whisking well after each addition, then stir in 2 teaspoons vanilla extract.
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Sift in flour, cocoa powder, and 1/2 teaspoon salt; fold gently until just combined.
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Pour batter into prepared pan, smoothing the top evenly.
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Sprinkle graham cracker pieces and milk chocolate pieces evenly over the batter.
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Bake for 20 to 25 minutes, until a toothpick inserted in the center comes out with a few moist crumbs.
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Allow brownies to cool completely in the pan.
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While brownies cool, sprinkle gelatin over 1/2 cup cold water in a small bowl; let stand to bloom.
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In a medium saucepan, combine 1 cup granulated sugar, corn syrup, and 1/4 cup water; heat to 240°F (115°C) on a candy thermometer.
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Split the vanilla bean and scrape seeds into the syrup, then stir in 2 teaspoons pure vanilla extract.
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In a stand mixer, beat egg whites with 1/4 teaspoon salt until soft peaks form.
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Slowly pour hot sugar syrup into the egg whites while mixing on medium-high speed until the marshmallow is thick and glossy.
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Add bloomed gelatin to the mixer and continue beating until the mixture holds stiff peaks.
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Spread the vanilla bean marshmallow evenly over the cooled brownies.
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Let the marshmallow layer set at room temperature for at least 2 hours before slicing.
Note
- Use a candy thermometer for precise sugar syrup temperature.
- For a toasted finish, briefly broil the marshmallow layer for 10 seconds.
- Store brownies in an airtight container at room temperature for up to 2 days.
- If desired, add extra graham cracker crumbs on top before serving for extra crunch.
