Mississippi Cornbread
["1 c. cornmeal, yellow or white", "3 tsp. baking powder", "1 1/2 tsp. salt", "1/4 c. sugar", "1/2 c. salad oil", "1 c. sour cream", "1 (8.5 oz.) can cream-style corn", "1 small onion, chopped"]
["Mix all ingredients in a large bowl.", "Bake in a 9-inch square baking pan or a 12-inch cast-iron skillet.", "Bake at 375\u00b0 about 35 minutes."]
["cornmeal", "baking powder", "salt", "sugar", "salad oil", "sour cream", "cream-style", "onion"]