That is — to fill ONE half sheet, we used:
16 cups of mini-marshmallows
12 cups of Rice Krispies (We used chocolate Lucky Charms.)
10 T butter
1/2 – 1 teaspoon salt
We lined our half sheet with aluminum foil; then sprayed it with non-stick. We melted the butter; then added the marshmallows and continued stirring over low heat until completely melted.
Stirred in cereal and mixed until all was coated. We pressed the mixture into the prepared baking sheet; then placed under a fan to cool (For about an hour). Then cut into bars and bagged them individually. Excellent!