Rice Krispie Bars

3 TBS butter
1 pkg (10 /12 oz) miniature Marshmellows
6 cups Rice Krispies creal

Put Marshmellows in microwave safe bowl. Add butter and microwave for 4 minutes. While microwaving, butter pan. Stir microwaved mixture until smooth and stir rice krispies in. Pour in buttered pan. Let cool.