Sponge Candy

Directions

1. 1
   Combine sugar, corn syrup and vinegar in heavy kettle.
2. 2
   Use a candy thermometer and boil (medium heat) to 300°.
3. 3
   Mixture will look as if it is going to burn.
4. 4
   Remove from heat and add baking soda.
5. 5
   (It is best to sift the soda; lumps will not break with stirring.)
6. 6
   Immediately start stirring very, very quickly and pour mixture into a thoroughly buttered 8 x 12-inch baking pan.
7. 7
   Allow mixture to cool for at least 4 hours, then break or cut into pieces and dip in melted chocolate.