Buttermilk Syrup

1 cube real butter
1 c. sugar
1/2 C. buttermilk
1 tsp. Karo syrup
1 tsp. baking soda
1 tsp. vanilla

Boil butter, sugar, buttermilk, and Karo. Remove from heat and add soda and vanilla. Mixture will bubble and double in size. Let set, stir occasionally. Serve hot.