Buttermilk Glaze

1 cup sugar
1/2 tsp soda
1/2 cup buttermilk
1/2 cup butter
1 Tbsp light Karo syrup
1 tsp vanilla

Combine everything except vanilla. Bring to boil in heavy pan. Boil for 4 minutes. Remove from heat, stir in vanilla. Pour while hot over the cake (while both are hot).