Pumpkin S'mores Bars Recipe tastes like a cozy campfire party collided with a slice of pumpkin pie and decided to live in your baking pan. It works perfectly for fall potlucks, Halloween parties, or any night when you want a fun dessert in about 45 minutes from start to finish. I tested these with my neighbors, and one of them texted me the next morning asking if I had “just one more square” left.

Why Pumpkin S'mores Bars Recipe Is Worth It

You get gooey marshmallow, melty chocolate, cinnamon-kissed pumpkin, and buttery graham cracker crust in every bite. The texture hits all the good spots: soft, chewy, slightly sticky, and just enough crunch from the crust.

This recipe bakes in one pan, slices cleanly, and travels easily. You can mix it by hand, use pantry staples, and customize it for picky eaters or dietary needs without stress.

“These Pumpkin S'mores Bars disappeared from the dessert table in ten minutes and people asked for the recipe before they finished chewing. ★★★★★”

Ingredients You Need

Crust

2 cups graham cracker crumbs
- Use regular honey grahams or cinnamon grahams. Gluten free graham crackers work well too.
8 tablespoons unsalted butter, melted
- Salted butter works in a pinch; just reduce added salt later.
2 tablespoons brown sugar, packed
1/4 teaspoon fine sea salt

Pumpkin layer

1 cup pumpkin puree
- Use canned pumpkin puree, not pumpkin pie filling. I like Libby’s for consistent texture.
1/2 cup brown sugar, packed
1/4 cup granulated sugar
1 large egg, room temperature
2 teaspoons vanilla extract
1 teaspoon ground cinnamon
1/2 teaspoon pumpkin pie spice
- Or use 1/4 teaspoon nutmeg + 1/4 teaspoon ginger if you do not keep pumpkin pie spice.
1/4 teaspoon fine sea salt
3/4 cup all purpose flour
- Use a 1:1 gluten free baking blend if needed.

S'mores topping

1 1/2 cups mini marshmallows
- Large marshmallows cut into quarters also work.
1 cup semi sweet chocolate chips
- Milk chocolate chips taste more classic s'mores style. Dark chocolate chips taste richer.
4 graham crackers, roughly broken into chunks

Pantry shortcuts and notes

Use pre-crushed graham cracker crumbs to save time and dishes.
Use pumpkin pie spice blend instead of measuring several spices.
Use chocolate chunks from a chopped bar if you want bigger pools of chocolate.

Equipment list

8×8 inch baking pan or 9×9 inch baking pan
Parchment paper
Mixing bowls, medium and large
Whisk and rubber spatula
Measuring cups and spoons
Small offset spatula or spoon for spreading batter
Wire rack for cooling
Sharp knife for slicing bars

Quick Tips & substitutions

Line the pan with parchment and leave overhang so you lift the bars out easily.
Press the crust firmly with the bottom of a measuring cup so it bakes sturdy and does not crumble.
Use room temperature egg so the pumpkin layer mixes smoothly.
Swap semi sweet chocolate chips with milk chocolate chips for a sweeter flavor.
Use gluten free graham crackers and a 1:1 gluten free flour blend for gluten free bars.
Use coconut oil instead of butter in the crust for a dairy light option, but chill before slicing.
Broil the topping for 1 to 2 minutes at the end if you want extra toasty marshmallows.
Chill the bars before slicing if you want super clean edges.

How to Make Pumpkin S'mores Bars Recipe

Step 1: Prep the pan and oven

Preheat the oven to 350°F. Line an 8×8 or 9×9 inch pan with parchment and leave a little overhang on two sides. Lightly grease the parchment so the bars release easily.

Step 2: Mix the graham cracker crust

Stir graham cracker crumbs, brown sugar, and salt in a medium bowl. Pour in melted butter and mix until the crumbs feel like wet sand and hold together when you squeeze them. Transfer the mixture to the pan and press it into an even, tight layer.

Bake the crust for 8 minutes until it looks set and smells toasty. Set the pan aside while you mix the pumpkin layer. Keep the oven at 350°F.

Step 3: Make the pumpkin batter

Whisk pumpkin puree, brown sugar, granulated sugar, egg, and vanilla in a large bowl until smooth and glossy. Add cinnamon, pumpkin pie spice, and salt, and whisk again. Sprinkle flour over the top and fold gently with a spatula until no dry streaks remain.

Do not overmix the batter so the bars stay tender. The batter will look thicker than pumpkin pie filling and that texture works perfectly.

Step 4: Spread pumpkin layer over crust

Pour the pumpkin batter over the warm crust. Use a spatula to spread it into an even layer that reaches all four corners. Tap the pan gently on the counter to release any air bubbles.

Bake for 18 to 20 minutes until the center looks set and a toothpick comes out with just a few moist crumbs. The top should not jiggle in the middle.

Step 5: Add the S'mores topping

Sprinkle chocolate chips evenly over the hot pumpkin layer. Scatter mini marshmallows on top, then tuck graham cracker chunks in between. Press everything gently so it sticks to the surface.

Return the pan to the oven and bake another 8 to 10 minutes. The marshmallows should puff and turn golden and the chocolate should look shiny and soft.

Step 6: Optional toasty finish

If you want deeper color on the marshmallows, switch the oven to broil on high. Broil for 30 to 60 seconds and watch closely so the topping does not burn. Pull the pan out as soon as the marshmallows reach your favorite level of toastiness.

Step 7: Cool and slice

Place the pan on a wire rack and let the bars cool at least 45 minutes. Lift the slab out by the parchment overhang. Use a sharp knife to slice into 9 large bars or 16 smaller bars, wiping the knife between cuts for neat edges.

Serve slightly warm for extra gooey texture or at room temperature for cleaner layers. I like to warm individual squares in the microwave for 10 seconds when serving leftovers.

Recipe Variations

Gluten free: Use gluten free graham crackers and a 1:1 gluten free all purpose flour blend.
Dairy free: Use vegan butter or coconut oil in the crust and dairy free chocolate chips.
Vegan: Use dairy free butter, dairy free chocolate chips, and vegan marshmallows, and swap the egg with a flax egg.
Low sugar: Use a sugar substitute that measures like sugar and choose dark chocolate chips.
Extra chocolate: Add 1/4 cup more chocolate chips to the topping or swirl 2 tablespoons chocolate hazelnut spread into the pumpkin layer.
Nutty twist: Sprinkle 1/3 cup chopped pecans or walnuts over the topping before baking.
Spiced up: Add extra 1/4 teaspoon pumpkin pie spice for stronger fall flavor.

Ways to Serve Pumpkin S'mores Bars Recipe

Serve slightly warm with a scoop of vanilla ice cream.
Pack cooled bars in lunchboxes as a special fall dessert.
Cut into bite size squares for party dessert platters.
Serve with hot chocolate, chai, or a mug of coffee for a cozy snack.
Crumble leftovers over yogurt for a sweet breakfast treat.

Storage Success

Let the Pumpkin S'mores Bars cool completely, then store them in an airtight container at room temperature for up to 2 days. If your kitchen runs warm, keep them in the fridge for up to 5 days and bring them to room temperature before serving. To freeze, wrap individual bars in plastic, place them in a freezer bag, and freeze for up to 2 months. Thaw at room temperature, then warm in the microwave for 10 to 15 seconds to revive the gooey marshmallow and chocolate.