Place Rice Krispies in a large mixing bowl and set aside.
Combine marshmallows and butter in a medium saucepan over medium low heat until mostly, melted, but still a bit lumpy.
Add in Nutella and continue stirring until smooth.
Pour over Rice Krispies, add salt, and stir until the cereal is well coated.
Spread evenly into lined pan and let set, then cut into squares and enjoy!
Notes
You'll need a large mixing bowl to ensure there is enough room to stir the cereal and Nutella marshmallow mixture together. When pressing the treats into the pan, press lightly. If they're pressed in tightly it will result in denser cereal bars.This recipe can be made in two 8x8 pans, or one 8x8 pan for extra thick Rice Krispie Treats.