Wacky Cake
["1 1/2 c. all-purpose flour", "3 Tbsp. cocoa", "1 c. sugar", "1 tsp. baking soda", "1/2 tsp. salt", "1 tsp. vinegar", "1 tsp. vanilla", "5 Tbsp. cooking oil", "1 c. water"]
["Sift dry ingredients into 8-inch cake pan.", "Make 3 depressions in dry ingredients.", "Pour vinegar into one, vanilla into another and oil in third.", "Pour water over all.", "Mix well until smooth. Bake at 350\u00b0 for 35 minutes.", "When cool, cut into squares.", "Serve topped with vanilla ice cream, whipped cream or chocolate fudge sauce."]
["flour", "cocoa", "sugar", "baking soda", "salt", "vinegar", "vanilla", "cooking oil", "water"]