DIRECTIONS

Line a 9-in. square baking pan with foil. Grease the foil with 1-1/2 teaspoons butter; set aside. In a large heavy saucepan, combine the sugar, milk, salt and remaining butter. Cook and stir over medium heat until sugar is dissolved. Bring to a rapid boil; boil for 5 minutes, stirring constantly.
    Remove from the heat; stir in chocolate chips and marshmallows until melted. Fold in 1/2 cup toffee bits and vanilla; mix well. Pour into a prepared pan. Sprinkle with remaining toffee bits. Chill until firm. Remove from pan and cut into 1-in. squares. Store in the refrigerator. Yield: 2 pounds.