Combine sugar, margarine and milk. Bring to a boil and boil for 5 minutes. Remove from heat and stir in chocolate chips until melted. Add marshmallow cream and mix well. Last stir in vanilla and nuts.
Pour into a large buttered cookie sheet. Cool until firm.
~You can use Pam for oiling the pan, just a light spray. Or if you don't want the oiled pan tin foil works really well also.
~It's pretty important to only use chocolate chips. I used chocolate chunks before and it did not work.
Madagascar Vanilla (purchase at Chefs Catalog) Of all the vanilla's I've used this is my favorite. Once you've tried it you won't go back!