Pour oil into metal 9x9 inch pan and place in oven. Preheat to 450F. Mix together dry ingredients. Add milk and egg and use a whisk to combine well. Carefully remove hot pan from the oven and tilt gently to oil the sides of the pan. Pour batter into pan, on top of hot oil, and spread the batter into the corners. Get a little of the oil on top of the batter if possible, as this will be delicious. Bake for about 15 minutes; a toothpick inserted into the middle will come out clean. Let cool for at least 5 minutes before cutting and serving.