Indoors: Preheat the oven to 400 degrees F.
In a mixing bowl, add the flour, cornmeal, sugar, salt, and baking powder. Mix well.
Make a well in the bottom of the cornbread mixture and crack the egg. Whisk until smooth. Add the milk and stir, and then add the melted butter and mix well.
Add the drained green chilis and bacon. Add ½ the reserved bacon grease and mix well.
In a Dutch oven, spread the remaining bacon grease to thoroughly grease the cast iron surface. Pour in the cornbread mixture and smack the Dutch oven down on the counter a few times to get the batter set. Bake for 20 to 25 minutes.