Preheat Your Oven:Set your oven to 425°F (220°C) and place the cast iron skillet inside to preheat. A hot skillet ensures the cornbread develops a crispy, golden crust.
Mix Dry Ingredients:In a large mixing bowl, whisk together the cornmeal, flour, baking powder, salt, and sugar (if using). This ensures an even distribution of leavening agents.
Prepare Wet Ingredients:In a separate bowl, whisk together the buttermilk, eggs, and melted butter. The buttermilk adds a tangy flavor and keeps the cornbread moist.
Combine Wet and Dry Mixtures:Gradually pour the wet mixture into the dry ingredients. Stir just until combined. Avoid overmixing to keep the cornbread tender.
Grease the Skillet:Using an oven mitt, carefully remove the hot skillet from the oven. Add a small knob of butter or a tablespoon of oil, swirling it to coat the bottom and sides of the skillet.
Pour and Bake:Pour the batter into the hot skillet, spreading it evenly. Return the skillet to the oven and bake for 20–25 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.
Cool and Serve:Allow the cornbread to cool in the skillet for 5 minutes. Slice into wedges and serve warm with your favorite accompaniments like butter, honey, or jam.