Sponge Candy
["1 c. sugar", "1 c. dark Karo", "2 Tbsp. vinegar", "1 Tbsp. baking powder"]
["Cook to 300\u00b0 hard crack the first 3 ingredients.", "Remove from heat and add the baking powder.", "Stir very quickly and pour into buttered 9-inch pan.", "This will harden very fast.", "Break into pieces."]
["sugar", "dark Karo", "vinegar", "baking powder"]