Name: Pumpkin S'mores Bars Recipe
Prep time: 20 min
Cook time: 35 min
Total time: 60 min
Ingredients: 2 cups graham cracker crumbs; 8 tablespoons unsalted butter, melted; 3 tablespoons brown sugar, packed; 1/4 teaspoon fine sea salt; 1 cup pumpkin puree; 1/2 cup brown sugar, packed; 1/4 cup granulated sugar; 1 large egg, at room temperature; 1 teaspoon vanilla extract; 1 teaspoon ground cinnamon; 1/4 teaspoon ground nutmeg; 1/4 teaspoon ground ginger; 1/8 teaspoon ground cloves; 1/4 teaspoon fine sea salt; 3/4 cup all-purpose flour; 1 1/2 cups mini marshmallows; 1 1/4 cups semi-sweet chocolate chips; 4 sheets graham crackers, broken into small chunks

Pumpkin S'mores Bars Recipe tastes like a campfire party met a slice of pumpkin pie and decided to become your new favorite fall dessert, and it comes together in about 1 hour start to finish. This recipe works perfectly for busy families, bake sales, potlucks, or anyone who wants cozy autumn flavor without fuss. I tested these on my neighbors during a football Sunday and they vanished before halftime, which felt both flattering and slightly alarming.

Why Make This Pumpkin S'mores Bars Recipe at Home

You control everything at home, from the level of pumpkin spice to how gooey you want the marshmallows. Store-bought treats rarely hit that perfect combo of chewy graham crust, soft pumpkin layer, and melty chocolate.

You also cut these bars any size you want, which helps when you host a crowd or pack lunchbox treats. The recipe uses simple pantry ingredients and one pan, so cleanup stays easy and your kitchen still smells like a bakery.

“These Pumpkin S'mores Bars taste like fall and summer had a dessert baby, and I could not stop at one square. ★★★★★”

Ingredients You Need

For the graham crust

2 cups graham cracker crumbs
- Use about 14 full sheets of graham crackers, or buy pre-crushed crumbs to save time.
8 tablespoons (1 stick) unsalted butter, melted
- Salted butter also works; just reduce added salt later.
3 tablespoons brown sugar, packed
1/4 teaspoon fine sea salt

For the pumpkin layer

1 cup pumpkin puree
- Use pure pumpkin, 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
1 teaspoon vanilla extract
1 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
1/4 teaspoon ground ginger
1/8 teaspoon ground cloves (optional, for stronger spice)
1/4 teaspoon fine sea salt
3/4 cup all-purpose flour

For the s'mores topping

1 1/2 cups mini marshmallows
- Large marshmallows work if you cut them into smaller pieces.
1 1/4 cups semi-sweet chocolate chips
- Milk chocolate chips give a sweeter, more classic s'mores flavor.
4 graham cracker sheets, broken into small chunks

Pantry shortcuts and substitutions

Use pumpkin pie spice (1 1/2 teaspoons) instead of the individual spices if you like.
Swap gluten free graham crackers and a 1:1 gluten free flour blend if you need a gluten free version.
Use dark chocolate chips if you prefer a less sweet bar.
Try coconut sugar in place of brown sugar for a slightly deeper, caramel-like flavor.

Equipment list

8×8 or 9×9 inch baking pan
- Line it with parchment and leave a little overhang so you lift the bars out easily.
Mixing bowls: one medium, one large
Whisk and rubber spatula
Measuring cups and spoons
Knife or offset spatula for spreading
Wire rack for cooling

Tips & Mistakes

Line the pan with parchment so the bars lift out cleanly and cut neatly.
Press the graham crust firmly with the bottom of a measuring cup so it stays together and does not crumble.
Use room temperature egg so it mixes smoothly into the pumpkin mixture.
Do not use pumpkin pie filling; it already contains sugar and spices and throws off the texture.
Stir the pumpkin layer gently and stop when the flour disappears so the bars stay soft, not tough.
Bake the crust briefly before adding the pumpkin layer so it sets and stays crisp.
Watch the marshmallows closely at the end; they go from toasted to burnt in under a minute.
Let the bars cool at least 45 minutes before cutting so the layers set and slices stay clean.
Use a sharp knife and wipe it between cuts to keep the marshmallow and chocolate from smearing.
Store leftovers in a single layer or with parchment between layers so the marshmallows do not weld together.

How to Make Pumpkin S'mores Bars Recipe

Step 1: Prep the pan and oven

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

Step 2: Mix the graham crust

In a medium bowl, combine graham cracker crumbs, brown sugar, and salt. Pour in the melted butter and stir until the crumbs look evenly moistened and clump slightly when you squeeze them. If the mixture looks dry and sandy, add 1 more tablespoon of melted butter.

Step 3: Press and bake the crust

Pour the crumb mixture into the prepared pan. Press it firmly into an even layer with your fingers, then use the bottom of a measuring cup to compact it. Bake the crust for 8 to 10 minutes until it looks set and smells toasty, then pull it from the oven and keep the oven on.

Step 4: Mix the pumpkin filling

In a large bowl, whisk pumpkin puree, brown sugar, granulated sugar, egg, and vanilla until smooth. Add cinnamon, nutmeg, ginger, cloves if using, and salt, then whisk again. Sprinkle the flour over the top and fold it in gently with a spatula until no dry streaks remain.

Step 5: Add the pumpkin layer

Pour the pumpkin mixture over the warm crust. Spread it into an even layer, reaching all the way to the corners. Tap the pan lightly on the counter to pop any large air bubbles.

Step 6: Bake the pumpkin layer

Return the pan to the oven and bake for 18 to 22 minutes. The center should look set and not jiggle when you nudge the pan. A toothpick inserted near the center should come out mostly clean, with maybe a few moist crumbs.

Step 7: Add the s'mores topping

Sprinkle the chocolate chips evenly over the hot pumpkin layer. Scatter the mini marshmallows on top, then tuck graham cracker chunks into the gaps. Press everything down very gently so the toppings stick without sinking deep into the pumpkin.

Step 8: Toast the topping

Place the pan back in the oven for 4 to 6 minutes until the marshmallows puff and turn golden on top. If you want deeper color, switch the oven to broil on low and toast for 30 to 60 seconds while you watch closely. Pull the pan out as soon as the marshmallows reach your favorite level of toastiness.

Step 9: Cool and slice

Set the pan on a wire rack and let the bars cool at least 45 to 60 minutes. Lift the slab out using the parchment overhang. Use a sharp knife to cut into squares or rectangles, wiping the blade between cuts for clean edges.

Variations I've Tried

Extra chocolate version: Sprinkle an extra 1/2 cup of chocolate chips under the pumpkin layer and another 1/2 cup on top for serious chocolate lovers.
Salted caramel twist: Drizzle 1/4 cup of thick caramel sauce over the pumpkin layer before you add the chocolate and marshmallows, then finish with a tiny pinch of flaky salt.
Nutty crunch: Add 1/2 cup chopped toasted pecans or walnuts to the pumpkin mixture for texture and a richer flavor.
Spice boost: Increase the cinnamon to 1 1/2 teaspoons and add a pinch of black pepper for a warm, bakery-style spice profile.
Lighter sweetness: Use dark chocolate chips and reduce the brown sugar in the pumpkin layer by 2 tablespoons for a less sweet bar that still tastes indulgent.

How to Serve Pumpkin S'mores Bars Recipe

Serve Pumpkin S'mores Bars slightly warm or at room temperature so the chocolate stays soft and the marshmallows taste gooey. I like to warm individual squares in the microwave for about 10 seconds and top them with a scoop of vanilla or cinnamon ice cream. These bars also pair nicely with hot cocoa, chai, or a big mug of coffee or tea. Pack them in lunchboxes, bring them to fall parties, or slice them small for a dessert platter with fruit and other cookies.

How to store

Room temperature: Keep bars in an airtight container at room temperature for up to 2 days. Line the container with parchment and place a sheet between layers so the marshmallows do not stick together.
Fridge: Store in the refrigerator for up to 5 days. Let bars sit at room temperature for 15 to 20 minutes before serving so the texture softens.
Freezer: Freeze bars in a single layer until firm, then wrap each piece tightly and store in a freezer bag for up to 2 months. Thaw in the fridge overnight or on the counter for about 30 minutes.
Reheating: Warm individual bars in the microwave for 8 to 12 seconds or in a 300°F oven for 5 to 7 minutes. Heat them just until the chocolate softens and the marshmallows loosen up again.