Annie'S Surprise Cake
["1 c. buttermilk", "1 c. Wesson oil", "1 c. sugar", "1 3/4 c. flour (plain)", "3 egg yolks", "1/2 tsp. soda", "1/4 tsp. salt", "2 heaping tsp. baking powder", "1 tsp. vanilla"]
["Beat all together.", "Bake 20 to 25 minutes at 375\u00b0."]
["buttermilk", "Wesson oil", "sugar", "flour", "egg yolks", "soda", "salt", "baking powder", "vanilla"]