Gather ingredients: Rice Krispies, Nutella, peanut butter, marshmallows, and Lucky Charms.

In a large saucepan over low heat, melt 4 cups of mini marshmallows with ¼ cup of butter, stirring continuously until melted and glossy.

Remove from heat and blend in ½ cup of Nutella and ½ cup of peanut butter until smooth.

Gently fold in 6 cups of Rice Krispies cereal until fully coated.

Sprinkle in 1 cup of Lucky Charms, folding them in carefully.

Lightly grease a 9x13-inch baking dish and press the mixture evenly into the pan.

Allow the treats to cool at room temperature for about 30 minutes or until set firm enough to cut into squares.