3/4 c. sugar
1/3 c. packed brown sugar
3 tbsp. light corn syrup
6 tbsp. sweet butter
1/4 c. water
3 tbsp. evaporated milk
1/4 tsp. vanilla

Place sugars, syrup, 2 tablespoons butter and water in pot. Heat until melted and smooth. Bring to a boil and boil until thermometer reaches 234 to 240 degrees. Stir in evaporated milk and rest of the butter, Boil until thermometer reaches hard crack stage, stirring occasionally. Remove from heat and quickly stir in vanilla. Pour on to a greased cookie sheet. Let cool and then crack into pieces.