Bring the flavor of a campfire inside with a decadent S’mores Poke Cake that layers buttery graham crumbs, a moist chocolate cake, pillowy marshmallow filling, and a silky chocolate pudding topping. Easy to assemble and show-stopping on the table, this dessert turns classic s’mores into a make-ahead crowd pleaser.
Why this S’mores Poke Cake is a Must-Try
This riff on the campfire favorite captures all the familiar flavors in one pan. The cake combines crunchy graham, gooey marshmallow, and rich chocolate for a dessert that’s both nostalgic and elegant.
- Crowd-friendly: feeds a group and travels well.
- Textural contrast: crunchy crust, tender cake, fluffy filling.
- Simple base: starts with a boxed chocolate cake for speed.
- Make-ahead: flavors deepen after chilling overnight.
What You Need: Ingredients and Pantry Staples
Gather basic grocery items. Quantities are for a 9×13-inch pan.
Graham Cracker Crust
- 2 cups graham cracker crumbs
- 2 tablespoons granulated sugar
- 1/2 cup melted unsalted butter

Chocolate Cake
- 1 box chocolate cake mix and ingredients called for on the box
Marshmallow Filling
- 1 (7 oz) jar marshmallow fluff
- 2 tablespoons hot water to loosen the fluff
Chocolate Pudding Layer
- 1 (3.9 oz) box instant chocolate pudding mix
- 2 cups milk, room temperature
- 1/3 cup unsalted butter
- 5 oz milk chocolate, finely chopped
Toppings
- 2 cups whipped cream
- 1 1/2 cups mini marshmallows
- 1/2 cup coarsely crushed graham cracker pieces
- 1/4 cup chopped milk chocolate or chocolate chips
- Optional: hot fudge or chocolate sauce for drizzling
Step-by-Step: How to Assemble the Cake
Follow these steps for a flawless result. Work while the cake is warm when directed.
- Make the crust: Mix graham crumbs, sugar, and melted butter. Press the mixture into the bottom of a greased 9×13-inch baking dish. Chill while preparing the batter.
- Prepare and bake the cake: Mix the boxed cake according to package directions. Pour the batter over the chilled crust and bake as instructed on the box.
- Create the pokes: After the cake cools for 5–10 minutes, use the handle of a wooden spoon to poke holes about two-thirds deep across the surface.
- Pipe the marshmallow: Stir the marshmallow fluff with hot water to thin slightly. Transfer to a resealable bag, snip a corner, and fill each hole with the marshmallow mixture.
- Make the chocolate layer: Melt chopped milk chocolate with the butter until smooth. Whisk the instant pudding with milk, then stir in the melted chocolate mixture. Pour the chocolate pudding over the marshmallow-filled cake, letting it seep into the pokes.
- Chill to set: Refrigerate the cake for at least 2–3 hours, until the pudding layer firms up.
- Add final toppings: Spread whipped cream across the top. Scatter mini marshmallows, crushed graham crackers, and chocolate bits. Finish with a drizzle of hot fudge if desired.
How to Toast Mini Marshmallows Without a Torch
Want that toasty finish but no torch? Your oven broiler will do the trick.

- Preheat the broiler on high and position an oven rack near the top.
- Lay marshmallows in a single layer on a parchment-lined baking sheet.
- Broil for 15–30 seconds. Watch carefully—they brown very fast.
- Allow to cool slightly, then lift toasted marshmallows off the paper and decorate the cake.
Timing, Servings, and Practical Tips
Plan ahead for chilling and assembly.
- Prep time: about 1 hour including cooling and assembly.
- Cook time: roughly 30 minutes, depending on box directions.
- Yield: serves about 12–16 slices.
- Tip: Let the cake cool slightly before poking to avoid too-deep holes or cake crumbling.
- Tip: Use room-temperature milk for smoother pudding.
Storage and Make-Ahead Advice for Parties
- Cover and refrigerate for 3–5 days; flavors improve overnight.
- Make the cake a day ahead, add marshmallow topping just before serving for best texture.
- Transport in the pan, wrapped tightly, for easy potluck delivery.
Flavor Variations and Serving Ideas
Customize the S’mores Poke Cake to suit holidays and tastes.
- Holiday version: Add red and green candies or crushed peppermint.
- Individual portions: Bake in muffin tins to make s’mores cupcakes.
- Peanut butter twist: Swap fudge for warm peanut butter and add chopped peanut butter candies.
- Extra crunch: Stir chopped graham pieces into whipped cream before spreading.
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