1 c. white sugar
1 c. dark Karo syrup
1 tbsp. baking soda
1 tbsp. vinegar

Combine sugar, syrup and vinegar in saucepan over medium heat, stirring until sugar is dissolved. Keep cooking without stirring to 300 degrees. Remove from heat. Quickly stir in baking soda. Mix well, this will foam a bit.

Pour onto lightly buttered 9 x 13 inch pan. DO NOT SPREAD. Let cool and break into pieces, dip in melted chocolate.