Grease a 9x13 inch baking dish, or line it with parchment paper. If you want to be able to remove the treats from the pan to cut them up, then be sure to leave a little bit of extra paper on the sides of the dish to use as handles to lift it out.
Measure 6 cups of rice cereal and set aside.
Melt the butter in the sauce pan over medium heat until completely melted.
Add the marshmallows to the pan. Rub some butter on your spatula and slowly mix the marshmallows until completely melted.
Add the vanilla extract and salt, if you'd like a flavor boost.
Remove the pan from the heat and immediately add the rice cereal to the pan. Use the spatula to mix the ingredients until the rice cereal is combined with the marshmallows.
Pour the rice cereal mixture into the prepared baking pan. Use the spatula to spread and flatten the rice cereal treat.
Let the rice cereal treat cool.
Once cooled, you can remove from the pan and cut into individual bars.
Notes
These rice cereal treats can be stored in air tight container in a cool dry place for 3-4 days.
If you don’t have parchment paper, you can use the extra butter to grease the baking pan. It will allow the rice cereal to be removed easily.