Wacky Cake
["1 1/2 c. flour", "1 c. sugar", "1 tsp. each: salt, soda and baking powder", "3 Tbsp. cocoa", "1 tsp. vanilla", "1 Tbsp. vinegar", "5 Tbsp. melted butter", "1 c. lukewarm water"]
["Preheat oven at 350\u00b0.", "Sift all dry ingredients into 8-inch square pan.", "Make 3 holes with spoon in dry ingredients.", "In one hole, put vanilla.", "In another, put vinegar and in last hole, melted butter.", "Pour lukewarm water over all.", "Stir, mixing well. Bake 30 minutes.", "Cool in pan; frost with chocolate frosting."]
["flour", "sugar", "salt", "cocoa", "vanilla", "vinegar", "butter", "water"]