When the last log settles into a steady bed of coals and the chatter around camp slows down, the Cast Iron S’mores Brownie Skillet is the kind of dessert that keeps everyone hovering near the fire. The skillet does all the work: deep chocolate brownie batter turns glossy and rich as it bakes, and the edges crisp up against the hot cast iron while the center stays soft enough to scoop.
Once the brownie is set, it’s all about that campfire finish—marshmallows scattered over the top and toasted right in the pan until they puff and bronze in spots. A handful of graham cracker pieces brings the familiar s’mores crunch, plus a little salt-sweet contrast against the melted chocolate. You’ll smell the sugar caramelizing before you see it, and that’s your cue to pull it before the top goes too far.
This campfire cast iron dessert is made for passing around with spoons, no plates required. Cleanup stays simple, too: one skillet, a quick wipe while it’s still warm, and you’re back to stargazing with something unapologetically gooey in hand.

Cast Iron S’mores Brownie Skillet
Equipment
- 10-inch cast iron skillet
- Mixing bowl
- Spatula
Ingredients
- 1 box brownie mix plus ingredients called for (usually water, oil, egg)
- 1 cup mini marshmallows
- 4 graham crackers broken into pieces
- 1/2 cup semi-sweet chocolate chips
- 1/4 cup neutral oil for greasing
Instructions
- Grease the skillet with oil. Prepare the brownie batter according to package directions in a bowl.
- Pour batter into the skillet and smooth the top. Scatter chocolate chips over the batter.
- Cover loosely with foil. Place skillet over medium campfire heat or on a grate. Rotate occasionally for even cooking.
- Bake 15-18 minutes, checking doneness with a toothpick.
- Remove foil. Sprinkle marshmallows and graham cracker pieces over the top.
- Return skillet to low heat and cover. Cook another 2-3 minutes until marshmallows are golden and melty.
- Let cool 5 minutes before serving directly from the skillet.