Hi, I’m Sophie Bennett. I’m happy you’re here to make s’mores brownies with toasted marshmallows with me. I love a dessert with a clear method and a little room for your own finishing touch. Today we’re aiming for a crisp graham base, fudgy brownie middle, and sticky toasted marshmallow topping, with each stage laid out so you can work at a comfortable pace.
This recipe makes 16 squares. Read through the directions first, set out the 9-inch square metal pan, and plan for the resting time before you begin. That small bit of preparation makes it easier to enjoy the process and serve the dessert at its best.
Why This Recipe Is Awesome
The appeal is a crisp graham base, fudgy brownie middle, and sticky toasted marshmallow topping. A baked graham layer creates the campfire-style base, while the brownie brings a thicker chocolate middle. Marshmallows go on only after the brownie is cooked. Brief broiling gives them color quickly, so the final stage needs continuous attention rather than another long bake.
Ingredients You’ll Need
The recipe card gives the complete quantities for every component. These ingredient notes explain a few details that make the method easier to follow.
- Fresh marshmallows melt more smoothly than stale ones. Measure the weight when possible because brands and sizes vary.
- Cocoa brings concentrated chocolate flavor. Break up lumps before mixing so dry pockets do not remain in the finished dessert.
- Chocolate supplies both flavor and body. If melting it, use gentle heat and keep stray water out of the bowl.
- Flour supplies structure; spoon and level it, or use the gram weight so the mixture does not become unnecessarily dry.
Tools & Accessories for This Recipe
Choose equipment that suits the recipe size and your workspace. These basic tools help with measuring, mixing, and handling the finished dessert.
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- 9-inch square metal pan — the specified size and shape for this batch. Find on Amazon
- Digital Kitchen Scale — measuring the base and filling ingredients consistently. Find on Amazon
- Mixing Bowls — keeping the recipe components separate until assembly. Find on Amazon
- Silicone Spatula — reaching the corners of the bowl and leveling the mixture. Find on Amazon
- Parchment Paper — making a sling when the recipe calls for one. Find on Amazon
- Sharp Kitchen Knife — cutting cooled bars neatly and evenly for serving. Find on Amazon
Step-by-Step Instructions
- Heat the oven to 350°F (175°C). Grease a metal pan suitable for broiling. Avoid exposed parchment because it can scorch under the broiler.
- Combine graham crumbs and melted crust butter. Press evenly across the base and bake for 8 minutes, then set aside.
- Melt brownie butter and chocolate gently. Cool for 5 minutes, then whisk in sugar, eggs, and vanilla until glossy.
- Fold in flour, cocoa, and salt just until combined. Spread the brownie batter over the warm crust without dragging crumbs into it.
- Bake for 23–28 minutes, until the brownie edges set and a tester has moist crumbs but no raw batter.
- Scatter marshmallows evenly over the surface. Switch to the broiler and position the pan about 8 inches below the heat.
- Broil for 30–90 seconds, watching continuously, until the marshmallows are lightly toasted. Remove immediately; browning can become burning very quickly.
- Cool completely in the pan before slicing. Use a lightly oiled knife, wiping it frequently to cut through the sticky marshmallow topping.
Use a metal pan when specified, since it responds differently to oven heat than a thick glass dish. Set the pan on the center rack and keep the surrounding space clear for even heat circulation.
Common Mistakes to Avoid
- Watch the broiler without stepping away, and use a broiler-safe metal pan rather than glass or exposed parchment.
- An uneven layer can leave the center underdone while the edges overbake. Spread the mixture into the corners at the same thickness.
- Changing pan dimensions changes depth and timing. Use the listed pan for this batch and begin checking near the earlier time.
- Cutting while hot can tear the crumb or release loose filling. Wait until the recipe has cooled or chilled fully.
Alternatives & Substitutions
Scatter 2 tablespoons finely chopped chocolate over the warm toasted marshmallows for an extra chocolate finish.
Keep the main structure of the recipe intact when making this variation. Replacing flour, fat, eggs, or dairy can require a different formula rather than a direct swap.
Storage and Serving
Store covered at room temperature up to 2 days or refrigerate up to 4 days. The graham crust softens and the topping grows stickier with storage.
Ingredient check: this recipe includes wheat, milk, eggs. Review packaged ingredients for additional allergens and use clean equipment when preparing food for guests.
For similar portions, mark the center of each side before cutting the slab into a grid. Clean the knife between rows rather than pushing accumulated crumbs or filling into every subsequent cut.
FAQ
Can I make this ahead?
Store covered at room temperature up to 2 days or refrigerate up to 4 days. Prepare any fresh garnish close to serving so it keeps its color and texture.
Which pan or container should I use?
Use the 9-inch square metal pan as written. The depth controls how the mixture sets, so changing the dimensions means you also need to reassess the timing.
What is the most important texture tip?
Watch the broiler without stepping away, and use a broiler-safe metal pan rather than glass or exposed parchment.
Can I change the flavor?
Scatter 2 tablespoons finely chopped chocolate over the warm toasted marshmallows for an extra chocolate finish. Make one small change at a time so it is easier to judge the result.
How do I know it is ready to serve?
Follow the texture cues in the directions and allow the full resting period. A surface that looks ready does not always mean the center is firm enough to cut.
Can I halve or double the recipe?
For a first batch, use the quantities and pan listed. Scaling changes thickness, mixing, and timing; multiplying ingredients alone does not establish a new baking time.
Can I broil in a glass pan?
Use a metal pan rated for broiler heat. Glass bakeware and exposed parchment may be unsuitable for that intense direct heat, so choose the pan before starting the crust.
S’mores Brownies With Toasted Marshmallows
Ingredients
Equipment
Method
- Heat the oven to 350°F (175°C). Grease a metal pan suitable for broiling. Avoid exposed parchment because it can scorch under the broiler.
- Combine graham crumbs and melted crust butter. Press evenly across the base and bake for 8 minutes, then set aside.
- Melt brownie butter and chocolate gently. Cool for 5 minutes, then whisk in sugar, eggs, and vanilla until glossy.
- Fold in flour, cocoa, and salt just until combined. Spread the brownie batter over the warm crust without dragging crumbs into it.
- Bake for 23–28 minutes, until the brownie edges set and a tester has moist crumbs but no raw batter.
- Scatter marshmallows evenly over the surface. Switch to the broiler and position the pan about 8 inches below the heat.
- Broil for 30–90 seconds, watching continuously, until the marshmallows are lightly toasted. Remove immediately; browning can become burning very quickly.
- Cool completely in the pan before slicing. Use a lightly oiled knife, wiping it frequently to cut through the sticky marshmallow topping.
Notes
- Yield: 16 squares
- Oven/heat: 350°F (175°C), then broiler
- Pan/container: 9-inch square metal pan
- Includes staged baking or stovetop work where applicable; use the texture cues in the method.
- Times are approximate: cook/bake 37 minutes (approximate); cooling/chilling/resting 1 hour 30 minutes (approximate; see method); total 2 hours 32 minutes (approximate).
- Watch the broiler without stepping away, and use a broiler-safe metal pan rather than glass or exposed parchment.
- Scatter 2 tablespoons finely chopped chocolate over the warm toasted marshmallows for an extra chocolate finish.
- Store covered at room temperature up to 2 days or refrigerate up to 4 days. The graham crust softens and the topping grows stickier with storage.
- Nutrition values are not provided; no calculated nutrition data is included.
Final Thoughts
S’mores Brownies With Toasted Marshmallows is a lovely excuse to slow down and make something sweet. Give the recipe its measuring, mixing, and resting time, then enjoy a crisp graham base, fudgy brownie middle, and sticky toasted marshmallow topping. Keep the recipe card handy for your next batch, and choose a simple finish that lets the dessert itself shine.
