These layered S’mores Brownies in Jars have all the amazing flavors of your favorite fireside treat in a fun presentation! 

Mason Jar Desserts are a fun way to share sweets at a gathering! Single servings prevent waste and eliminate the need to plate servings for your guests!

S'mores Brownies in Jars on a red and white napkin with two spoons

S’mores Brownies in Jars

This s’mores inspired dessert, S’mores Brownies in Jars, was a snap to prepare. A layer of graham cracker crust was topped with some fudgy brownie dough and baked in cute little mason jars.

Marshmallows filled the rest of the jars and were broiled to give that characteristic roasted s’mores look. You can also make these using a boxed brownie mix, which will most likely fill more than 4 jars.

S'mores Brownies in Jars overhead view

S’mores Desserts

We spent many summer vacations with my in-laws up in Wisconsin. Boating, fishing, Packer worshiping were all part of our adventures up north. Come sundown, we’d get a roaring campfire going and spend the last minutes of twilight searching for the perfect marshmallow roasting sticks.

Making s’mores by squeezing a charred and gooey marshmallow and a piece of milk chocolate between two graham crackers was part of our nightly routine. But even better than traditional campfire s’mores are s’mores desserts like these layered brownies.

Is It Safe to Bake in Mason Jars?

Mason jars are made for canning, so they can tolerate temperatures. Buy a good quality canning jar to ensure they stand up to baking.

How to Store Mason Jar Desserts

Thankfully, these desserts in jars are self-sealing, so it’s easy to store the leftovers. Just screw on the caps and store them in the refrigerator for up to 3 days or the freezer for up to 3 months. Bring to room temperature then gently warm if desired to soften the marshmallows.

Threee S'mores Brownies in Jars with red handled spoons

What is Jarcuterie?

A new fad with the global pandemic in full swing is to serve appetizers in jars, like cheese sticks, crackers, and cured meat. It’s much safer than hovering around a cheeseboard with many hands reaching in to grab a nibble. Other ideas include veggie sticks and dip, cheese puffs, or anything on skewers! Jarcuterie is a term that comes from blending charcuterie, AKA a cheeseboard, with jars.

More S’mores Inspired Recipes:

S'mores Brownies in Jars on a red and white napkin with two spoons

S'mores Brownies in Jars

Prep Time 20 minutes
Cook Time 28 minutes
Total Time 48 minutes
Yield 4

A twist on the classic campfire dessert with s'mores ingredients layered in mason jars!


Graham Cracker Crust:

  • 1 cup graham crackers
  • 1/4 cup (1/2 stick) melted butter
  • 1 tablespoon sugar

Brownie Layer:

  • 1/4 cup butter (1/2 stick)
  • 4 ounces semi-sweet chocolate, chopped
  • 3/4 cup sugar
  • 2 eggs, at room temperature
  • 1 teaspoon vanilla
  • 1/4 cup plus 2 tablespoons flour
  • 1/4 cup plus 2 tablespoons flour


  • Mini or regular sized marshmallows


Set canning jars on baking sheet.

Mix together graham cracker crumbs, melted butter and sugar. Place approximately ¼ cup in bottom of each jar and tamp down to make and even layer.

Preheat oven to 350º.

Make brownie batter by melting chocolate and butter in microwave safe bowl, zapping and stirring at 30 second increments till smooth and melted. Mix in sugar and vanilla and let cool a few minutes. Mix in eggs, then salt and flour.

Divide batter evenly between the four jars. Bake for approximately 30 minutes (time will vary depending on diameter of jars). Start checking at 25 minutes, making sure centers look cooked before removing from the oven. You can use a toothpick to check doneness.

Let cool about 15 minutes.

Top each with a handful of mini-marshmallows or a few large marshmallows. Place under broiler, about 6 inches from element, until tops are browned, about 2-3 minutes. Watch carefully to prevent burning.


Note: You will need 4 canning jars with about a 1 to 1 ¼ cup capacity

Nutrition Information:



Serving Size:

1 jar

Amount Per Serving: Calories: 565Total Fat: 25gSaturated Fat: 14gTrans Fat: 1gUnsaturated Fat: 10gCholesterol: 125mgSodium: 234mgCarbohydrates: 83gFiber: 3gSugar: 63gProtein: 7g


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