Quick 'N' Slick Chocolate Cake
["3 c. sifted flour", "2 c. sugar", "3/4 c. cocoa", "2 tsp. baking soda", "1 tsp. salt", "2 tsp. baking powder", "2 eggs, unbeaten", "1 c. salad oil", "2 tsp. vanilla", "1 c. sour milk or buttermilk", "1 c. lukewarm water"]
["Grease and flour 9 x 12-inch oblong pan.", "Sift together all dry ingredients into mixing bowl.", "Make well in center of dry ingredients; pour rest of ingredients into depression.", "Blend slowly (low speed on electric mixer), then beat at medium speed or with rotary egg beater for 4 minutes.", "Scrape down bowl.", "Fill pan with batter.", "Bake at 350\u00b0 for 45 minutes.", "Top with peanut butter frosting."]
["flour", "sugar", "cocoa", "baking soda", "salt", "baking powder", "eggs", "salad oil", "vanilla", "sour milk", "water"]