01 - Preheat your oven to 400°F (200°C). Place a 10-inch cast-iron skillet in the oven to heat.
02 - In a large bowl, whisk together the cornmeal, flour, sugar, baking powder, baking soda, and salt.
03 - In a separate bowl, whisk the buttermilk, eggs, melted butter, and pickle juice until well combined.
04 - Pour the wet ingredients into the dry ingredients. Stir gently until just combined; do not overmix.
05 - Fold in the cheddar cheese, chopped pickles, jalapeños, and chives (if using).
06 - Carefully remove the hot skillet from the oven. Add 1 tablespoon butter, swirling to coat the bottom and sides evenly.
07 - Pour the batter into the hot, buttered skillet, smoothing the top surface.
08 - Bake for 25–30 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.
09 - Allow the cornbread to cool in the skillet for 10 minutes before slicing. Serve warm.