Peanut Butter Smores Cookie Bars
These easy peanut butter s’mores cookie bars combine classic campfire flavors—gooey marshmallows, melty chocolate, and peanut butter—in a chewy, crowd-pleasing dessert. With just six main ingredients and minimal prep, they’re perfect for parties, potlucks, or a quick homemade treat.
- Prep Time: 10 minutes
- Cook Time: 20 minutes
- Total Time: 35 minutes
- Yield: 16 bars 1x
- Category: Dessert
- Cuisine: American
Ingredients
Scale
- 1 1/2 cups graham cracker crumbs (about 120g)
- 3/4 cup creamy peanut butter (about 180g)
- 1/2 cup unsalted butter, melted (about 113g)
- 3/4 cup brown sugar, packed (about 150g)
- 1 1/2 cups mini marshmallows (about 75g, divided)
- 1 cup chocolate chips (semi-sweet or milk, about 170g)
- Optional: pinch of salt (if using unsalted peanut butter)
- Optional: 1 teaspoon vanilla extract
Instructions
- Preheat oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper or coat with nonstick spray.
- In a large mixing bowl, combine peanut butter, melted butter, and brown sugar. Stir until smooth and glossy. Add vanilla extract if using.
- Add graham cracker crumbs and stir until a thick dough forms. If too dry, add a tablespoon of milk or water; if too sticky, add more crumbs.
- Fold in chocolate chips and 1 cup mini marshmallows. Reserve the remaining 1/2 cup marshmallows for topping.
- Press dough evenly into the prepared pan.
- Sprinkle reserved mini marshmallows on top and gently press them into the surface.
- Bake for 18-22 minutes, until edges are golden and set but center is still slightly soft. Marshmallows on top should be puffed and just starting to brown.
- Cool in the pan for at least 30 minutes before slicing. For cleaner cuts, chill in the fridge for 20 minutes.
- Lift bars out using parchment overhang and cut into squares. Serve and enjoy!
Notes
For gluten-free bars, use gluten-free graham crackers. Substitute sunflower seed butter for nut-free, or use vegan butter and chocolate for dairy-free/vegan. Don’t overbake—bars firm up as they cool. Chill before slicing for clean edges. Top with extra chocolate chips or a sprinkle of sea salt for added flavor.
Nutrition
- Serving Size: 1 bar (1/16 of pan)
- Calories: 210
- Sugar: 16
- Sodium: 90
- Fat: 10
- Saturated Fat: 4
- Carbohydrates: 26
- Fiber: 1
- Protein: 3
Keywords: peanut butter, s'mores, cookie bars, dessert, easy, party, marshmallow, chocolate, potluck, summer, baking