Melt the butter in a medium saucepan over medium heat until melted.
Then add the Fluff and a pinch of salt then stir until the Fluff is smooth. I like to transfer the hot mixture to a metal mixing bowl, but you can mix in the saucepan.
Add the 2 cups of the cereal to the mixture at a time and mix.
Then place cereal and Fluff mixture into your prepared pan and press down evenly.
Cool for 45 minutes.
Use your parchment paper to lift the treats from the pan and place on the cutting board. Using a serrated knife cut into 12 squares. Serve and enjoy!