Start by placing 4 tablespoons of unsalted butter in a large saucepan over low heat. Stir the butter occasionally until it's completely melted and smooth.

Pro Tip: Let the butter cook for a minute to bring out a richer, deeper flavor that pairs beautifully with the marshmallow fluff.

Once the butter has melted, reduce the heat further and add 7 ounces of marshmallow fluff. Stir continuously until the fluff is fully incorporated and the mixture becomes smooth and creamy.

Helpful Hint: Marshmallow fluff can be quite sticky! To make stirring easier, lightly grease your spatula or spoon with butter or cooking spray.

Take the saucepan off the heat and quickly add 6 cups of Rice Krispies cereal. Gently stir until every piece of cereal is evenly coated with the marshmallow mixture.

Tip for the Best Texture: Be careful not to stir too aggressively, as this can crush the cereal. Instead, use a gentle folding motion to keep the crispiness intact.

Grease a 9x13-inch baking dish lightly or line it with parchment paper for easy removal. Carefully transfer the Rice Krispie mixture into the dish, using a buttered spatula or a piece of wax paper to gently press the mixture down into an even layer.

Important Tip: Avoid pressing too firmly; a light touch will keep the treats soft and chewy, while pressing too hard can make them dense.

Let the treats cool completely at room temperature for about 30 minutes before cutting them into squares. If you're short on time, pop them into the fridge for 10 to 15 minutes to speed up the cooling process.