In large pot, melt butter on medium heat. Add in marshmallows and stir constantly until completely melted. Remove from heat. Fold in pudding mix until fully combined. Fold in cereal.
Immediately pour cereal into prepared baking dish. Using buttered fingers, press treats into (don't over press or they get hard and dry tasting).
Allow to set 20 minutes or more before cutting and eating. Enjoy!
Notes
Be careful not to press the dough too aggressively with your hands. Overworking the batter will make the finished treats tough and dry! Remember that the harder you press, the harder they will be to get out.
The trick to pressing Rice Krispies in your pan without the batter sticking to your hands is to run your fingers in water. Shake off the excess, and press. Voila. No sticking!
For easier removal from the pan, line your baking dish with parchment paper first.
Store these treats in an airtight container. To keep the treats from sticking together, separate layers with parchment paper.
These treats keep well stored at room temperature for about 5 days. But these are so delicious that chances are good that you won’t be able to resist eating them all in a couple of days!