01 -
Combine sugar, evaporated milk, butter and salt in medium saucepan. Heat over medium, stirring constantly until boiling.
02 -
Stir in chocolate chips until melted and smooth.
03 -
Remove from heat. Quickly stir in marshmallows, vanilla and optional nuts until marshmallows melt completely.
04 -
Transfer to greased 8-inch square pan and smooth top.
05 -
Cool at room temperature until firm before cutting into squares.