1c brown sugar
1c. (2 sticks) butter
1c. light corn syrup
1 (14oz) can sweetened condensed milk
1 tsp vanilla
Melt brown sugar and butter into saucepan until smooth. Add syrup and milk. Continue to stir constantly until mixture reaches 244 degrees on candy thermometer. Remove from heat, add vanilla. Pour mixture onto buttered parchment paper lined 9"pan. Put in freezer until set. Cut into pieces.