Slightly butter a 13 x 9 x 2 inch dish or pan. In large bowl, melt 1/4 cup butter. Microwave on high for 1 minute. Add 10 ounce package marshmallow; cover with wax paper and microwave on high 3 minutes. Stir together. Add 5 cups Rice Krispies. Blend and press firmly into dish.

ICING:

1 (6 oz.) pkg. chocolate bits
1 (6 oz.) pkg. butterscotch bits

Put bits in glass bowl and mix together; cover with plastic wrap (not wax paper) and microwave 6 minutes at medium. The bits will be glass and hold their shape when done. Mix together and put icing on crispies. Refrigerate short while to set icing.