Set up a large saucepan over low heat and add the butter. Stir until melted and just begins to bubble, releasing a rich aroma and a smooth, glossy appearance.
4 cups marshmallows, 3 tablespoons unsalted butter
Add the marshmallows to the melted butter, stirring continuously with a rubber spatula. Cook until the marshmallows are fully melted and mixture is smooth, about 3-5 minutes. You should see a shiny, viscous mixture.
4 cups marshmallows, 3 tablespoons unsalted butter
Remove the saucepan from heat and immediately pour in the Rice Krispies cereal. Gently fold the cereal into the marshmallow mixture until evenly coated and the mixture starts to lose its shine, about 2 minutes.
6 cups Rice Krispies cereal
Line a 9x13 inch baking dish with parchment paper or lightly spray with non-stick spray. Transfer the cereal mixture into the dish and press down firmly with a spatula or buttered hands to create an even, compact layer. Press sprinkles evenly over the top for a festive look.
Red, white, and blue sprinkles decorative sprinkles
Allow the treats to cool at room temperature for at least 20-30 minutes until set and firm. Once cooled, cut into squares using a sharp knife.
Optional: Decorate with additional sprinkles or drizzle melted chocolate for extra flair. Serve immediately or store in an airtight container for up to 3 days.
Red, white, and blue sprinkles decorative sprinkles
