S'mores Nutella Bars

1 . Stage

Preheat the oven to 350 degrees F (175 degrees C). Line a 9x13-inch baking pan with aluminum foil, leaving a 2-inch overhang on 2 sides. Grease the foil.

2 . Stage

Break graham crackers into the bowl of a food processor. Process into crumbs. Add melted butter and sugar; process until mixture resembles wet sand.

3 . Stage

Pour graham cracker mixture into the prepared baking pan. Press down flat using the bottom of a glass.

4 . Stage

Bake in the preheated oven until crust is set, 12 to 15 minutes.

5 . Stage

Place chocolate chips in the top of a double boiler over simmering water. Stir frequently, scraping down the sides with a rubber spatula to avoid scorching, until chocolate is melted, about 5 minutes. Mix in chocolate-hazelnut spread and cinnamon.

6 . Stage

Pour chocolate mixture over the crust; level out with a spoon. Press marshmallows into the chocolate, covering it completely.

7 . Stage

Place baking pan in the refrigerator until chocolate firms up, about 2 hours.

8 . Stage

Set an oven rack about 6 inches from the heat source and preheat the oven's broiler. Toast marshmallows under the broiler for 1 to 2 minutes. Cut s'mores into bars.