Step 1

In a large saucepan, melt butter over medium heat. Swirl the pan occasionally until the butter foams, then browns and smells nutty, about 3-5 minutes. Watch closely, as butter can burn quickly.

Step 2

Once browned, remove the pan from heat and immediately add 8 cups of marshmallows. Stir constantly until smooth.

Step 3

Add the vanilla extract and salt, stirring again. Add cereal and the remaining 2 cups of marshmallows. Fold gently until everything is coated in marshmallow fluff.

Step 4

Press the mixture into a greased 9x13 inch baking pan. Let cool completely at room temperature, about 1 hour.

Step 5

Cut into bars and serve. Enjoy!