Line 8" square baking pan with foil.
In 2 quart saucepan, combine sugar, marshmallow creme, milk, butter, Kahlua a,nd salt. Bring to a rapid boil, stirring constantly for 5 minutes.
Remove from heat; add all chocolate. Stir until melted. Add nuts and vanilla. Turn into prepared pan.
Refrigerate until firm.
To serve, cut in squares.
Makes about 2 3/4 pounds.