1 ½ cups white sugar
½ cup butter
1 5oz (2/3 cup) evaporated milk
1 7oz jar jet puffed marshmallow
3 cups semisweet chocolate chips (I sometimes mix in milk or white chocolate)
½ t vanilla
2 cups nuts - if you like
Sugar, butter, milk and marshmallow in heavy saucepan, bring to a full rolling boil on medium heat, stirring constantly.
Continue boiling for 5 minutes on medium heat or until candy thermometer reaches 234 degrees. Don't scorch.
Remove from heat.
Gradually stir in chips until melted then add vanilla and nuts.
Pour into a prepared pan (lightly grease or use wax paper).
Let set or you can refrigerate it to set faster.