Roasted marshmallow between two Oreo cookies gives you the kind of messy, sticky dessert people lean over the fire for before the first one is even finished. The cookies soften just enough from the heat, the marshmallow turns molten in the center, and the whole thing eats like a campfire classic with a chocolate-cookie twist.
The trick is keeping the marshmallow in that sweet spot: browned on the outside, soft enough to slump, but not so far gone that it slides off the stick before you can build the sandwich. Keeping the Oreo cream on one side helps the cookie halves cling together a little better, which matters once the marshmallow starts oozing.
Below you’ll find the small details that make these worth doing right, plus a few easy swaps if you’re making them at home instead of around a fire.
The marshmallow got perfectly gooey and the Oreo held up better than I expected. I let it cool for a minute like you said, and it was the cleanest campfire s’more I’ve ever made.
Pin these Oreo s’mores for the next campfire night when you want gooey marshmallows and a no-fuss dessert with just three ingredients.
The marshmallow has to be roasted, not just warmed
The mistake with Oreo s’mores is rushing the marshmallow. If it’s only heated, it stays bouncy and doesn’t give you that soft center that smears into the cookie. Roast it until the outside is deeply golden in spots and the marshmallow starts to sag on the stick. That little collapse is your cue that the inside has turned gooey enough to build the sandwich.
Oreo cookies bring their own structure, which is helpful, but they can still crack if the marshmallow is too hot or if you press too hard. Let the marshmallow sit for a few seconds after roasting, then sandwich it gently. The minute of cooling isn’t decoration; it keeps the filling from blasting out and gives the cookie time to soften into the marshmallow instead of shattering against it.
What the Oreo filling is doing here
- Oreo cookies — The cream filling acts like a little adhesive, which helps the two cookie halves hold together once the marshmallow starts melting through. Generic chocolate sandwich cookies can work, but classic Oreos stay sturdier and bring the right cocoa flavor.
- Large marshmallows — Use standard large marshmallows, not minis. Minis melt too fast and don’t give you the tall, gooey center that makes this dessert worth making. If all you’ve got are jumbo marshmallows, slice them in half after toasting so they don’t overpower the cookies.
- Roasting sticks — A long skewer or roasting stick gives you control over the heat and keeps your hand out of the flame. If you’re making these at home over a gas flame, use a clean metal skewer or long tongs and rotate slowly for even browning.
Build the sandwich the moment the marshmallow turns soft
Separating the cookies cleanly
Twist each Oreo gently so the cream stays on one side. That’s not just for neatness; the filling gives the sandwich a little grip and helps the top cookie stay put once everything softens. If a cookie breaks, use it as the bottom half. The marshmallow will hide a lot.
Roasting to the right color
Hold the marshmallow close enough to the heat to brown, but not so close that it catches and drips off the stick. Rotate it often so the outside turns evenly golden with a few darker spots. If it flames, pull it back and let the fire settle. A marshmallow that looks black on the outside usually tastes bitter, not caramelized.
Pressing and waiting
Set the roasted marshmallow onto one cookie half, top it with the second half, and press just enough to spread the marshmallow to the edges. Don’t smash it flat. Let it rest for a minute before eating so the center settles and the cookie softens instead of crumbling into your lap.
How to change these for different setups
Make them at home without a campfire
Toast the marshmallows under a broiler or with a kitchen torch. The broiler works fast, so watch closely and turn the marshmallows as soon as the tops start to brown. You lose a little of the smoky campfire flavor, but the gooey center and crisp-soft cookie contrast stay the same.
Use gluten-free sandwich cookies
A good gluten-free chocolate sandwich cookie makes this work for gluten-free guests without changing the method. Expect a slightly more fragile cookie, so build and eat these closer to the heat source and handle them with a lighter touch.
Try peanut butter or mint Oreos
Flavored Oreos change the dessert without changing the technique. Peanut butter versions add a salty edge that plays nicely with toasted marshmallow, while mint Oreos push it toward a cooler, candy-bar style finish.
Storage and Reheating
- Refrigerator: Best eaten right away. Stored assembled, the cookies turn soft and sticky within a few hours.
- Freezer: Not a good freezer dessert. The marshmallow texture changes too much and the cookies lose their snap after thawing.
- Reheating: Reheat the marshmallow first and assemble fresh. If you’ve already built them, a quick 5- to 10-second hit under a broiler softens the center, but the cookie will be fragile and can collapse if overheated.
Questions I Get Asked About This Recipe
Oreo S'mores
Ingredients
Equipment
Method
- Separate the Oreo cookies, keeping the cream filling intact on one side of each cookie.
- Thread the marshmallows onto roasting sticks.
- Roast the marshmallows over campfire until golden brown and gooey, turning as needed to prevent scorching and watching closely.
- Place each roasted marshmallow on one Oreo cookie half and top with another cookie half to sandwich.
- Press gently to spread the marshmallow so it oozes slightly at the edges.
- Let the Oreo s'mores cool for 1 minute before eating so the marshmallow sets just enough to hold together.
