English Toffee

English Toffee
1 c. sugar
2 sticks butter
1 T. vanilla
3 T. water
1 c. chocolate chips, or 5 Hershey bars
Crushed pecans or almonds (optional)

In medium saucepan - cook sugar, butter, vanilla, and water on medium-high heat. Bring to a boil and continue boiling (stirring constantly) for about 10 minutes until thick and caramel color, or until candy thermometer reaches about 300 degrees. Pour onto a small cookie sheet or pizza pan with a rim and spread evenly. Immediately top with chocolate chips or bars and let sit a few minutes. Take a butter knife and spread chocolate smooth over top. Top with crushed nuts, if desired. Let cool and break into pieces.