Step 1

Preheat oven to 425°. Whisk together first 5 ingredients in a large bowl. Whisk together buttermilk and eggs; stir into cornmeal mixture just until combined. Heat a 10-inch cast-iron skillet over medium-high heat until it just begins to smoke. Add butter, and stir until butter is melted. Stir melted butter into cornbread batter. Pour batter into hot skillet.

Step 2

Bake at 425° for 25 to 30 minutes or until golden and cornbread pulls away from sides of skillet. Invert cornbread onto a wire rack; serve warm.