Ton-tongue toffee

1. Place all ingredients in a heavy saucepan

2. stir over a medium heat until sugar disolves

3. without stiring, boil mixture until it reaches 290 F on a candy themometer

4. pour into a buttered 9 by 12 inch pan

5. let cool until almost firm to touch

6. mark into 2 inch squares with a sharp knife

7. when cool break into squares or shards