I have not tried it yet, but this is the recipe I got from the Senior Brunch.
BUTTERMILK SYRUP
1 cube butter
3/4 c. sugar
1/2 c. buttermilk
1 tsp vanilla
1 tsp baking soda
Bring the first three ingredients to a boil and boil for one minute, stirring constantly. Remove from heat and add vanilla and baking soda. Stir and Serve.