Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      cup           sugar
   1      cup           dark corn syrup
   1      tablespoon    cider vinegar
   1      teaspoon      baking soda

Preparation:

Makes 1 pound 1. Stir together sugar, corn syrup and vinegar in heavy 3-quart saucepan; stirring constantly, cook over medium heat until mixture boils. 2. Without stirring, continue cooking until temperature on candy thermometer reaches 300 F., or a small amount of mixture dropped into very cold water separates into threads that are hard and brittle. 3. Remove from heat; stir in baking soda. 4. While still foaming, pour into greased 8 x 8 x 2-inch baking pan; do not spread. 5. Cool; break into pieces. Store in airtight container.