Blueberry Cake
["1 box Duncan Hines butter cake mix (do not add butter)", "3 eggs", "1 c. buttermilk", "3/4 c. Crisco oil", "1/3 c. sugar"]
["Grease sides and bottom of each layer pan.", "Makes 3 layers. Bake at 350\u00b0 for 20 to 25 minutes."]
["cake mix", "eggs", "buttermilk", "Crisco oil", "sugar"]