The Original Fantasy Fudge
This recipe used to be found on the back of a well known brand of marshmallow cream. Many were surprised when it was changed. This is the original! You may find that most packages of chocolate chips are 10 ounces now; 12 ounces of chocolate chips is roughly 2 cups.
To make in microwave, melt margarine in a 4-quart microwave-safe dish and mix sugar and milk into the margarine. Microwave mixture until it begins to boil, about 5 minutes on high, and stir after 3 minutes. Scrape bowl and continue to boil on high for 5 1/2 more minutes. Remove from microwave and stir in chocolate chips until melted, then stir in marshmallow creme, walnuts, and vanilla extract. Pour into prepared baking pan.