Created by NELady on July 30, 2023
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.