Really Good Cornbread

Ingredients (Serves 8)
¼ cup bacon fat
1 ½ cups stone-ground organic yellow cornmeal
½ cup flour
1 tablespoon baking powder
1 teaspoon salt
1 large egg
1 cup whole milk
3 scallions, minced
¼ cup unsalted butter, melted
Preheat oven to 450°F
Heat the bacon fat in a 10-inch cast iron skillet in the middle of the oven for 5 minutes. While the fat heats, whisk together the cornmeal, flour, baking powder, and salt in a large bowl. Whisk together the egg and milk in a small bowl. Add this mixture to the dry ingredients. Stir to combine.Carefully remove the hot skillet from the oven and stir the scallions into the hot fat. Add the melted butter. Stir all of this into the batter until just combined, then pour the batter into the hot skillet. Place the skillet back into the middle of the oven and bake until golden, about 10 minutes. Remove and allow to cool.