Quick Skillet S’mores Brownie Bars

By AislePrompt Editorial · Published 2026-06-30 · Updated 2026-06-30

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are developed and reviewed.

Decadent, fudgy brownie bars topped with marshmallows and graham cracker crumbs, cooked quickly in a skillet for a nostalgic dessert. This American-inspired recipe, ready in about 35 minutes, layers unsalted butter, granulated sugar, large egg into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 280 calories and feeds 8, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 10 min Cook: 25 min Serves 8 American cuisine 280 cal/serving

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Ingredients

1/2 cup (1 stick) unsalted butter
1 cup granulated sugar
1 large egg
1 tsp vanilla extract
3/4 cup all-purpose flour
1/4 cup unsweetened cocoa powder
1/4 tsp baking powder
1 cup mini marshmallows
1/2 cup, crushed graham crackers
1/4 tsp salt

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Instructions

Step 1: Preheat oven to 350°F. In a microwave-safe bowl, melt 1/2 cup unsalted butter for 30 seconds until fully melted.
Step 2: Stir in 1 cup granulated sugar until combined, then whisk in 1 large egg and 1 tsp vanilla extract until smooth and glossy.
Step 3: In a separate bowl, sift together 3/4 cup all-purpose flour, 1/4 cup unsweetened cocoa powder, 1/4 tsp baking powder, and 1/4 tsp salt.
Step 4: Gradually fold the dry ingredients into the wet ingredients until just combined.
Step 5: Lightly grease an 8-inch ovenproof skillet and spread the brownie batter evenly inside.
Step 6: Bake for 18 minutes, then remove from oven and immediately sprinkle 1 cup mini marshmallows evenly over the top.
Step 7: Return skillet to oven and bake an additional 5 minutes until marshmallows are puffed and golden.
Step 8: Remove from oven and sprinkle 1/2 cup crushed graham crackers over the marshmallow topping for crunch. Let cool for 10 minutes before slicing into bars and serving.