Preheat your oven to 425°F. Spoon some all-vegetable shortening into an 8-inch ovenproof skillet or an 8-inch round or square baking pan. Place the pan in the oven to heat for about 5 minutes.
In a medium bowl, whisk the egg. Then, stir in the cornmeal mix, sugar (if using), buttermilk, and oil, just until moistened. The batter will be lumpy, and that's okay.
Carefully remove the hot skillet or pan from the oven, and tilt it to coat the bottom with the melted shortening.
Pour the batter into the greased, hot pan, and spread it evenly.
Bake the cornbread for 20-25 minutes, or until it's golden brown and a toothpick inserted into the center comes out clean.
Allow the cornbread to cool slightly before cutting it into servings. Enjoy your White Lily Cornbread warm, with butter or your favorite toppings!