Best Chocolate Cake
["1 c. all-purpose or cake flour", "1 c. sugar", "1/2 tsp. baking soda", "1/2 tsp. salt", "1/4 tsp. baking powder", "1/4 c. plus 2 Tbsp. water", "1/4 c. plus 2 Tbsp. buttermilk", "1/4 c. shortening", "1 egg", "1/2 tsp. vanilla", "2 oz. melted unsweetened chocolate (cool)"]
["Heat oven to 350\u00b0.", "Grease and flour square pan; either 8 x 8 x 2-inch or 9 x 9 x 2-inch.", "Beat all ingredients in a large mixer bowl on low speed, scraping the bowl constantly, for 30 seconds. Beat on high speed, scraping the bowl occasionally, for 3 minutes. Pour into pan.", "Bake for 30 to 35 minutes, or until a wooden pick inserted in the center comes out clean."]
["all-purpose", "sugar", "baking soda", "salt", "baking powder", "water", "buttermilk", "shortening", "egg", "vanilla", "chocolate"]