1/4 cup butter or marg.
6 cups miniature marshmallows
12 oz. chocolate chips
1/4 cup light corn syrup
2 cups walnuts chopped
3 cups rice crispy cereal

Put the butter, corn syrup, chocolate chips and 3 cups of the marshmallows into bowl. Micro wave at high for approx. 3 minutes. Stir well. Microwave 3 more minutes until the marshmallows and chocolate have melted - stirring well! Stir 2 more cups of the marshmallows, 1 1/2 cups of the walnuts and the rice crispy cereal into the mixture. Blend well. Spread into greased 9x13" baking pan. Sprinkle the rest of the marshmallows and nuts over top. Press them into the mixture. Let sit  then cut into bars.