How to make Rice Krispie treats.
In a large saucepan, melt butter over medium heat. Once melted, add in all but 1 cup of marshmallows. Reduce heat to low and continue stirring until completely melted.  Add the cereal and the remaining 1 cup of marshmallows. Pour into the prepared baking dish. Press GENTLY with your fingertips just until completely spread out. Allow to set, about 1 hour. Cut and enjoy!