Easy Microwave Marshmallow Rice Cereal Treats

Step 1: In a microwave-safe bowl, combine the unsalted butter and sweetened condensed milk.

Step 2: Heat the mixture in the microwave in 30-second increments until the butter is melted and the two ingredients are well combined. Stir the mixture between each interval to ensure even heating.

Step 3: Once the butter and sweetened condensed milk are hot thoroughly mixed, stir in the pure vanilla extract and salt until well incorporated.

Step 4: Pour the butter mixture over the marshmallow and cereal mixture. Gently stir everything together until the cereal and marshmallows are evenly coated with the butter mixture.

Step 5: Add optional additions (if using) and gently mix them in.

Step 6: Transfer the mixture into a greased 9x13-inch baking dish. Press it down with a spatula or the back of a spoon to create an even layer.

Step 7: Let the mixture cool and set at room temperature for about 30 minutes.

Step 8: Once cooled and set, cut the marshmallow crispy treats into squares or rectangles using a sharp knife.