Sponge Candy
["1 c. dark Karo", "1 c. sugar", "1 Tbsp. vinegar", "1 Tbsp. baking soda"]
["Place Karo, sugar and vinegar in saucepan.", "Boil until crystallized or 300\u00b0.", "Remove from heat; add baking soda and pour into greased pan.", "Cool; break up in pieces."]
["dark Karo", "sugar", "vinegar", "baking soda"]