Absolute magic!!
2 cubes butter or margarine
1 c buttermilk
1 t baking soda
2 c sugar
2 T corn syrup
2 t vanilla
Melt butter in saucepan (choose a large saucepan as syrup will foam up while cooking). Add buttermilk, baking soda, sugar, and corn syrup. Cook over medium heat, stirring constantly, until mixture boils. Boil 5 minutes, stirring constantly. Remove from heat. Stir in vanilla. Serve warm.