Lucky Charms Cereal Treats

Name: Lucky Charms Cereal Treats
Prep time: 30 min
Total time: 30 min
Cuisine: American
Ingredients: Nonstick spray, for greasing tin; 113 grams unsalted butter (1/2 cup/1 stick); 430 grams marshmallows (15 ounces); 1 teaspoon vanilla extract; 1/8 teaspoon fine sea salt; 225 grams Lucky Charms cereal (about 6 cups); 18 grams cereal marshmallows, to decorate (1/2 cup); 50 grams green candy melts or white chocolate, to decorate (1/3 cup; 1 3/4 ounces); Pastel nonpareils or St. Patrick’s Day sprinkles, to decorate