Line a quarter sheet pan with parchment paper. Arrange 9 of the graham crackers (it may be more like 8.5) in a single layer.

Add the chocolate chips and nutella to a microwave-safe bowl. Microwave for 1 minute, then stir. An additional 30 seconds can be added if needed.

Microwave the butter and 1 1/2 cups marshmallows together in another bowl for one minute. Stir until smooth.

Pour the chocolate over the graham crackers, spreading evenly all the way to the sides. Drizzle the melted marshmallow over.

Crush the remaining graham cracker. Sprinkle the graham cracker, remaining marshmallows and pretzel sticks over the park.

Place in the freezer for 10-15 minutes to set the chocolate. Remove and break apart into pieces.