Easy Choclate Fudge

This is so easy and neary fool-proof. Children love it and it dosen't take long to make.

First, line a 8 or 9 inch baking pan with foil.

Combine the following in a medium size, heavy duty sauce pan or double boiler:
12 oz package semi-sweet chocolate chips
1 can sweetened condensed milk
On lowest possible heat warm until all morsels are melted, stirring constantly until smooth.
Remove from heat and stir in the following:
1 cup chopped walnuts (optional)
1 tsp vanilla extract

Spread evenly in baking pan. Refrigerate for 2 hrs or until firm.
Lift out fudge by foil. Remove foil and cut into pieces.