7 Minute Fudge

2 cups sugar
3 Tbl butter or margarine
1/2 tsp salt
1 cup evaporated milk
1/2 cup miniature marshmallows
1-1/2 cups Chocolate Chips
1 tsp vanilla
2/3 cup nuts (optional)

Mix sugar, butter, salt and milk in pan. Using medium heat, stir till sugar is dissolved. Continue stirring and allow to boil 7 minutes. Turn burner off. Add marshmallows, chocolate chips and vanilla and stir till they dissolve. Place in a buttered 8 inch pan. Cool.