01 - Preheat your oven to 400°F (200°C). Place a 10-inch cast-iron skillet in the oven to heat while preparing the batter.
02 - In a large mixing bowl, whisk together the cornmeal, all-purpose flour, granulated sugar, baking powder, baking soda, and fine sea salt.
03 - In a separate bowl, whisk together the buttermilk, eggs, pickle juice, and melted butter until thoroughly combined.
04 - Pour the wet ingredients into the bowl with the dry ingredients. Stir gently until just combined. Avoid overmixing to ensure a tender crumb.
05 - Gently fold in the shredded cheddar cheese, diced dill pickles, finely chopped jalapeños, and fresh chives, if using.
06 - Carefully remove the preheated skillet from the oven. Add the 1 tablespoon of unsalted butter and swirl it to coat the bottom and sides of the skillet.
07 - Pour the prepared cornbread batter into the hot, buttered skillet. Smooth the surface gently with a spatula for even baking.
08 - Bake for 28–32 minutes, or until the cornbread is golden brown on top and a toothpick inserted into the center emerges clean.
09 - Allow the cornbread to cool in the skillet for 10 minutes before slicing and serving. This helps it set properly.