Pumpkin S’mores Bars Recipe

Pumpkin S'mores Bars Recipe tastes like a cozy campfire party collided with a slice of pumpkin pie in the best way possible. It works perfectly for fall gatherings, bake sales, or weeknight treats and takes about 45–50 minutes from start to finish. I tested this batch while my kids circled the kitchen like dessert sharks, so you know it passed the real-life taste test.

Why You Should Try This Pumpkin S'mores Bars Recipe

These pumpkin s'mores bars layer a buttery graham cracker crust, spiced pumpkin filling, melty chocolate, and gooey toasted marshmallows. You get all the flavor of classic s'mores with the soft, custardy vibe of pumpkin pie in a neat handheld square.

The recipe uses simple pantry ingredients and comes together without fancy equipment. You can bake it ahead, chill it, and then toast the marshmallows right before serving, which makes it perfect for holidays and potlucks.

“These Pumpkin S'mores Bars taste like fall at a campfire party in your kitchen, and everyone asked for seconds. ★★★★★”

Ingredients You’ll Need

For the graham cracker crust

• 1 ½ cups graham cracker crumbs
  • Use about 10–12 full sheets; store brands work fine, but I like Honey Maid for consistent texture.
• 6 tablespoons unsalted butter, melted
  • Salted butter also works; just reduce added salt later.
• 3 tablespoons granulated sugar
• ¼ teaspoon fine sea salt

For the pumpkin layer

• 1 cup pumpkin puree
  • Use 100% pumpkin, not pumpkin pie filling. Libby’s gives a thick, reliable texture.
• ½ cup brown sugar, packed
• ¼ cup granulated sugar
• 1 large egg
• 1 large egg yolk
• ½ cup heavy cream
  • You can swap half-and-half, though the texture turns slightly less rich.
• 1 teaspoon pure vanilla extract
• 1 teaspoon ground cinnamon
• ½ teaspoon ground ginger
• ¼ teaspoon ground nutmeg
• ⅛ teaspoon ground cloves
• ¼ teaspoon fine sea salt

For the chocolate and marshmallow topping

• 1 ½ cups semi-sweet chocolate chips
  • Use chips or chopped bar chocolate; Ghirardelli or Guittard melt very smoothly.
• 3 cups mini marshmallows
  • Mini size melts and toasts more evenly than large ones.

Optional mix-ins and swaps

• ½ cup chopped pecans or walnuts in the pumpkin layer for crunch
• Use dark chocolate chips if you prefer a deeper chocolate flavor
• Use cinnamon graham crackers for extra spice
• Use vegan marshmallows and dairy-free chocolate for a dairy-light version

Equipment

• 8×8 or 9×9 inch baking pan
  • Line with parchment and leave an overhang for easy lifting.
• Mixing bowls (one medium, one large)
• Whisk and rubber spatula
• Measuring cups and spoons
• Small saucepan or microwave-safe bowl for melting butter
• Oven and optional broiler or kitchen torch for toasting marshmallows
• Wire rack for cooling

Tips & Tricks

• Line the pan with parchment so you lift the bars out cleanly and slice without sticking.
• Press the graham crust firmly with the bottom of a measuring cup so it bakes into a solid base that does not crumble.
• Use room temperature egg and cream so the pumpkin filling mixes smoothly without lumps.
• Stir the pumpkin filling gently and avoid overmixing so the bars bake with a custardy, not airy, texture.
• Bake the pumpkin layer until the center jiggles slightly but does not slosh; it finishes setting as it cools.
• Cool the bars before adding marshmallows so the chocolate sets into a distinct layer instead of blending into the pumpkin.
• Toast the marshmallows under the broiler on the middle rack and watch closely; they go from golden to burnt in seconds.
• Chill the bars before slicing so you get clean squares and neat layers.
• Wipe your knife between cuts or use a warm knife for tidy edges.
• Store leftover bars in a single layer or with parchment between layers so the marshmallows do not glue everything together.

How to Make Pumpkin S'mores Bars Recipe

Step 1: Prepare the pan and oven

Preheat your oven to 350°F. Line an 8×8 or 9×9 inch pan with parchment paper, leaving some overhang on two sides to lift the bars out later. Lightly grease the exposed sides of the pan so nothing sticks.

Step 2: Mix and press the graham cracker crust

In a medium bowl, combine graham cracker crumbs, sugar, and salt. Pour in the melted butter and stir until the crumbs look evenly moistened and clump when you squeeze them. Transfer the mixture to the pan and press it into an even layer with your fingers, then pack it firmly with the bottom of a measuring cup.

Bake the crust for 8–10 minutes until it looks lightly golden and smells toasty. Set the pan on a wire rack while you mix the pumpkin layer. Keep the oven on.

Step 3: Whisk the pumpkin filling

In a large bowl, whisk pumpkin puree, brown sugar, and granulated sugar until smooth. Add the egg and egg yolk and whisk until the mixture looks glossy and uniform. Pour in the heavy cream and vanilla and whisk again.

Sprinkle in cinnamon, ginger, nutmeg, cloves, and salt. Whisk just until the spices blend into the mixture and no streaks remain. Scrape the sides and bottom of the bowl with a spatula so everything mixes evenly.

Step 4: Bake the pumpkin layer

Pour the pumpkin filling over the warm graham crust and spread it into an even layer. Tap the pan gently on the counter to pop any air bubbles. Bake for 20–25 minutes, until the edges look set and the center jiggles slightly when you nudge the pan.

Place the pan on a wire rack and let the bars cool for at least 20–30 minutes. The pumpkin layer continues to set as it cools, which keeps the layers distinct.

Step 5: Add the chocolate layer

Sprinkle the chocolate chips evenly over the warm pumpkin layer. The residual heat softens the chocolate so it melts gently. Wait 3–5 minutes, then use a spatula to spread the softened chocolate into a smooth layer.

If your kitchen runs cool and the chocolate does not melt enough, place the pan back in the warm (turned off) oven for 2–3 minutes. Spread again until you get a glossy, even chocolate blanket. Let the pan cool until the chocolate mostly sets, about 15–20 minutes at room temperature or 10 minutes in the fridge.

Step 6: Top with marshmallows and toast

Scatter the mini marshmallows over the chocolate layer in an even, thick blanket. You want them snug, with very little chocolate peeking through. Place the pan on the middle rack under the broiler.

Broil for 1–3 minutes until the marshmallows puff and turn golden brown with some darker spots. Watch the pan the entire time, since marshmallows shift from perfect to charred very quickly. If you use a kitchen torch instead, toast the marshmallows in sweeping motions until you like the color.

Step 7: Cool, chill, and slice

Let the bars cool at room temperature until the pan feels just slightly warm. Transfer the pan to the fridge and chill for at least 1 hour so the pumpkin and chocolate layers firm up. Use the parchment overhang to lift the slab onto a cutting board.

Spray a sharp knife lightly with cooking spray or run it under warm water, then dry it. Slice into 9 large bars or 16 smaller squares. Serve slightly chilled or at cool room temperature so the layers hold but the marshmallows still taste soft and gooey.

What to Serve with Pumpkin S'mores Bars Recipe

Serve these pumpkin s'mores bars with cold milk, hot cocoa, or a big mug of chai or coffee. A scoop of vanilla or cinnamon ice cream on the side turns them into a full-on plated dessert. Fresh apple slices or a simple fruit salad balance the sweetness and add a bit of crunch. I also like to set them on a dessert board with sliced apples, pretzels, and extra chocolate squares for a fun fall spread.

Storage Options

• Store leftover bars in an airtight container in the fridge for up to 4 days; keep them in a single layer or separate layers with parchment.
• Chill the bars before stacking so the marshmallow topping firms up and does not glue everything together.
• Freeze the bars without the marshmallow layer for best texture; wrap tightly and freeze up to 2 months, then thaw in the fridge and add fresh marshmallows to toast before serving.
• Reheat individual bars gently in the microwave for 10–15 seconds or in a 300°F oven for 5–8 minutes to soften the chocolate and marshmallows slightly.