English Toffee

Directions

1. 1
   Generously butter a cookie sheet.
2. 2
   Put butter, sugar, and water in a heavy pan or skillet over medium-high heat.
3. 3
   Bring to a bubbling boil, stirring constantly with a wooden spoon, about 10 minutes.
4. 4
   Remove spoon from pan, and cook to a very brittle stage (300 degrees to 310 degrees F on a candy thermometer).
5. 5
   Or, make a cold water test: candy will separate into hard, brittle threads when dropped in cold water.
6. 6
   Remove from heat and add nuts to mixture.
7. 7
   Add vanilla and salt.
8. 8
   Pour onto prepared cookie sheet and spread to 1/4-inch thickness.
9. 9
   Cool slightly, top with chocolate chips or chocolate bars, and spread as it melts.
10. 10
    Cool completely and break into pieces.
11. 11
    Store in an airtight container.