Spoon shortening into a cast iron skillet and place into the oven while it preheats.
Add cornmeal, all purpose flour, sugar, baking powder and salt into a mixing bowl and whisk together.
Melt the butter and add to the cornmeal mixture with egg and milk.
Whisk together until smooth.
When oven is preheated the shortening will be melted, carefully remove from the oven with oven mitts.
Fill the hot skillet with batter and spread evenly.
Bake for 15- 17 minutes or until cornbread is golden brown and a toothpick inserted in the center comes out clean.
Remove from oven.
Cut into wedges and serve with butter.