Melt the butter in the microwave using a large microwave-safe bowl in 30-second increments and stirring between each increment.
Add the marshmallows to the melted butter and microwave in 30-second increments and stirring between each increment.
Stir the Rice Krispie cereal into the melted marshmallow mixture. When you get to your 10th cup, only add one cup at a time. You want the Rice Krispie Treats to stick together but do not want them to become dense or dry.
Pour the Rice Krispie Treats onto a 12x17 baking sheet that's been greased or sprayed with non-stick cooking spray. Push the mixture out to the edges and then gently press the treats into the pan using your fingers, a spatula, or a piece of wax paper sprayed with cooking spray.
Let the Rice Krispie Treats set for a short time before cutting. Store covered at room temperature.
We use a silicone spatula sprayed with non-stick cooking spray to stir our treats together.Keep treats airy with the marshmallow mixture visible by not adding too much cereal or packing it too densly.
This recipe was calculated using the exact brands and measurements I used to make this recipe. If you are following a strict diet please note changing anything will cause the nutritional info to change. My calculations are intended as a guide only.