Magelby's Syrup

1/2 cup butter (not margarine)
1/2 cup buttermilk
1 cup sugar
1 tsp. vanilla ( 2 tsp)
1/2 tsp. baking soda

Heat butter, buttermilk, and sugar in a saucepan. Heat until boiling, stirring often. Boil for 1 minute, remove from heat and add vanilla and baking soda, stir until combined the soda will bubble up, so be careful.