1 c. sugar
1 c. dark corn syrup
1 tbsp. vinegar
1 tbsp. baking soda

Combine sugar, corn syrup and vinegar in heavy saucepan. Stir over medium heat until sugar dissolves. Continue cooking without stirring, until candy thermometer registers 300 degrees or a drop of the mixture becomes brittle in cold water. Remove from heat. Quickly stir in baking soda, mixing well. Pour quickly into lightly buttered 9 inch square pan. (Do not spread as candy will spread itself). Cool. Break into pieces. Store in airtight container. Makes about 1 pound.