pa's favorite rhubarb cake ⁄ c. shortening ⁄ c. sugar eggs ⁄ c. buttermilk ⁄ tsp. vanilla c. flour tsp. baking soda ⁄ tsp. salt c. rhubarb topping: / c. sugar ⁄ tsp. cinnamon cream shortening with sugar. add eggs, buttermilk and vanilla. stir in flour, baking soda and salt. stir in rhubarb. mix topping...