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Prep Time:
25 Minutes
Marinade Time:
2 Hours to set
Grill time:
10 Minutes

Planked S’mores

with Homemade Marshmallows

Posted on by Andrea Alden
Planked S’mores
Serves 12
Prep Time:
Marinade Time: 2 Hours to set
Grill time: 10 Minutes
National S’mores Day occurs every 10th of August and this year we wanted to take part by making something extra special! Planked S’mores with Homemade Marshmallows! Homemade marshmallows are rich, fun, and surprisingly easy to make. Turning them into s’mores seemed like the logical next step. Making S’mores on the grill, even more so. Dazzle your friends, family, and guests with these sweet treats. It takes about 45 minutes to make the marshmallows themselves; the trick is having the patience to let them set. Once set, it’s the work of a moment to get these beauties grilling for an amazing dessert of ultra homemade S’mores.
Boil the sugar for 1 minute
Boil the sugar for 1 minute
Whip it good for 12 minutes
Whip it good for 12 minutes
The dog is helping
The dog is helping

Planked S’mores

Serves: 12       Total Time: 35 Minutes + Set Time


  • 3 packets (28g each) of unflavored gelatin
  • ½ cup of cold water
  • 2 cups of sugar
  • 2/3 cup of corn syrup (light or dark)
  • ¼ cup of water
  • ¼ tsp. salt
  • 1 tsp. vanilla extract
  • 1 tsp. spiced rum
  • neutral flavored oil like canola or grapeseed
  • parchment paper
  • 1 cup of confectioner’s sugar
  • ½ cup of fine graham cracker crumbs
  • 1 cup of chocolate chips or chocolate bar, chopped
  • 2 tsp. butter
  • ½ cup of cream
  • 2 Napoleon Maple Planks, soaked at least 30 minutes 


Step 1
In the bowl of a stand mixer with the whisk attachment, add the cold water and three packets of gelatin. Let both sit together for 10 minutes to bloom.
Step 2
While the gelatin is blooming, combine the sugar, corn syrup, and water. Over medium high heat, bring the mixture to a boil. Boil for 1 minute.
Step 3
Turn your stand mixer to high. Very carefully pour the boiling sugar mixture into the bowl of the stand mixer with the gelatin. Mix on high for 12 minutes.
Step 4
Around the 6 or 7-minute mark, add the salt, vanilla, and rum. Continue mixing.
Step 5
While the marshmallows are mixing, line a 9 x 13–inch pan with parchment paper, leaving enough paper overhanging to cover the top of the marshmallows completely when folded over. Brush the inside thoroughly with the oil, including the flaps that will be folded back over.
Step 6
Once the sugar mixture has been beaten for 12 minutes, use a spatula to pour the now white and fluffy mixture into the waiting pan. Fold the flaps over top and allow the marshmallows to set for at least 2 hours if not overnight.
Step 7
When you’re ready to cut the marshmallows, dust your countertop with confectioner’s sugar. Lightly brush the knife you are using with the oil. Cut the marshmallows into as many squares as you want, you can get 12 to 16 if not more. You may need to wipe the blade and re-coat with oil after ever cut. This keeps the marshmallows looking really pretty and prevents sticking.
Step 8
The side of the marshmallows that is facing up are still sticky, Carefully lift them and dip the sticky side into a waiting bowl full of graham crumbs, coating as much of the bottom and sides of your mallows as you want. Coat whatever is still sticky with confectioner’s sugar.
Step 9
Heat the cream over low heat until steaming. Add the butter and the chocolate, stirring until it’s completely melted. Using a sharp knife and a spoon, dig out a hole in the top of the marshmallow and fill it with the melted chocolate.
Step 10
Heat the rear burner of the grill to medium high, about 400°F. Place the S’mores onto the soaked planks and then onto the grill in front of the burner. Turn after 1 minute or as soon as the sides of the marshmallow begin to brown. Keep turning the planks or the S’mores until all sides (except the bottom) are golden and roasted.
Step 11
Serve immediately.
Fill the prepared pan
Fill the prepared pan
Slice with an oiled knife
Slice with an oiled knife
Dip in graham cracker crumbs
Dip in graham cracker crumbs
Plank roast for 1 minute per side
Plank roast for 1 minute per side
Once toasted, serve right away
Once toasted, serve right away
Look at that golden deliciousness
Look at that golden deliciousness

Planked S’mores with Homemade Marshmallows may seem like a daunting, and labor-intensive recipe, but I assure you it’s not as hard or scary as the instructions sound. The end product is beyond worth it – though I use my crème brule torch to make roasted marshmallows for a snack when the craving strikes me – so I may be a tad biased when it comes to toasted marshmallows. If you are a fan of chocolate, marshmallows, s’mores, or any combination of the three, you will absolutely love these Planked S’mores.

Happy Grilling! 

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