1/4 c. butter
40 lg. marshmallows
6 c. Rice Krispie cereal

In a large bowl, melt butter on high 1 minute. Add marshmallows and microwave on high 2-3 minutes. Stir until they are well blended. Add cereal and mix together. Press warm mixture evenly and firmly into 9 x 13 inch tupperware type pan. Cut into squares when cool.