melted unsweetened chocolate
Mix sugar, Karo, water and salt together in pan, cook over medium heat to boil, reduce heat. Cook without stirring to 248 degrees.
Beat egg whites until stiff. Pour 1/2 of the syrup mixture over egg whites, beating constantly.
Cook the remaining half of the syrup mixture to 272 degrees. Add slowly to the first mixture,continue beating for 5 minutes.
Add melted chocolate and vanilla. Beat until mixture holds it shape.
Add nuts and drop by spoonfuls onto waxed paper lined cookie sheet.