Maple Sponge Candy

Directions

1. 1
   Butter a 9 x 9-inch pan and set aside.
2. 2
   In a heavy 2-quart saucepan, combine the syrup, sugar and vinegar.
3. 3
   Bring to a boil over medium heat, stirring constantly until the sugar dissolves.
4. 4
   Continue cooking without stirring until a candy thermometer reads 300°F Remove from heat and quickly stir in the soda; mix well.
5. 5
   Pour into prepared pan. Do not spread.
6. 6
   Cool and break into pieces.