3 tablespoons butter
1 (10-ounce) bag Jet-Puffed minimarshmallows
6 cups cereal of your choice
Lightly grease a spatula and a standard 9-by-13-inch casserole dish.
In large nonstick saucepan, melt butter over low heat. Add marshmallows, and stir occasionally until completely melted. Remove from heat.
Add cereal. Quickly stir until cereal is well coated.
Pour and press into casserole dish until evenly distributed. Cool for about 30 minutes. Cut into squares. Best if served the same day. Otherwise, store in an airtight container or plastic wrap for up to two days.