Buttermilk Icing - cooking recipe

Ingredients

2 c. sugar
1/2 c. butter
1 tsp. vanilla
1 c. buttermilk
1 tsp. soda

Preparation

Mix all ingredients in a large saucepan, except vanilla. Bring to a boil and cook until forms a soft ball, 238\u00b0 on candy thermometer.
Remove from heat; add vanilla and beat until thick. Spread on warm cake.