Chocolate Snack Cake
["1 2/3 c. flour", "1 c. firmly packed brown sugar", "1/4 c. cocoa", "1 tsp. baking soda", "1/2 tsp. salt", "1 c. water", "1/3 c. vegetable oil", "1 tsp. vinegar", "1/2 tsp. vanilla"]
["Heat oven to 350\u00b0.", "Mix flour, brown sugar, cocoa, baking soda and salt with fork in ungreased square pan (8 x 8 x 2-inch).", "Mix in remaining ingredients.", "Bake until wooden pick inserted in center comes out clean, 35 to 40 minutes.", "Dust with powdered sugar, if desired."]
["flour", "brown sugar", "cocoa", "baking soda", "salt", "water", "vegetable oil", "vinegar", "vanilla"]