Texas Sheet Cake
["2 c. flour", "2 sticks oleo", "1 c. water", "1 tsp. baking powder", "1 tsp. vanilla", "2 c. sugar", "5 Tbsp. cocoa", "2 eggs, lightly beaten", "1/2 c. buttermilk"]
["Grease and flour 10 x 15 x 1-inch jelly roll pan.", "Heat oven to 400\u00b0."]
["flour", "oleo", "water", "baking powder", "vanilla", "sugar", "cocoa", "eggs", "buttermilk"]