1/4 c. butter
45 lg. marshmallows (or 4 c. miniature)
5 c. Rice Krispies cereal

Place butter and marshmallows in a 3 quart casserole. Do not cover. Microwave 3 minutes, stirring often. Add cereal and mix until completely coated with marshmallow mixture. With buttered hands, press into 8"x12" or 9"x13" pan. Cool. Cut into bars. Makes 24 large bars.