In the West, See's Candy Stores are famous. This is the only recipe which has been made public. The rest are still secret.

3 (6 ounce) packages chocolate chips
2 cups nuts (any kind)
2 teaspoons vanilla extract
1 cup butter or margarine

Let chocolate chips, nuts, vanilla extract and butter stand until room temperature in a large bowl (overnight is fine).

4 cups granulated sugar
20 large marshmallows, cut up
1 (13 ounce) can evaporated milk

Bring sugar and milk to boil in a large saucepan and keep at a rolling boil for 8 minutes. Dump this all at one time over the chocolate mixture. Add marshmallows and stir vigorously by hand until chocolate bits and butter are melted and mixture is smooth. Pour into a 15 x 13-inch cake pan or a 13 x 9-inch pan. Cool and refrigerate for 24 hours before eating.

It will keep well in the refrigerator and will last...and last...and last.