01 - Melt butter in a large skillet over medium heat. Sauté celery, onion, and carrot until soft, 5–7 minutes. Remove from heat.
02 - Combine crumbled cornbread, sautéed vegetables, parsley, salt, pepper, sage, thyme, and garlic powder in a large bowl.
03 - Stir in broth and eggs until mixture is moist and cohesive. Add additional broth by the tablespoon if mixture appears too dry.
04 - Scoop mixture into 2-tablespoon portions and gently roll into balls. Arrange on a baking sheet and refrigerate for 20 minutes to firm.
05 - Set up three shallow bowls: flour in the first, beaten eggs in the second, panko breadcrumbs in the third.
06 - Roll each chilled ball lightly in flour, dip in egg, then coat thoroughly with panko, pressing gently to adhere.
07 - Heat 2 inches of oil in a large pot or deep skillet to 350°F. Fry balls in batches for 2–3 minutes until golden brown and crispy.
08 - Transfer to a paper towel–lined plate to drain. Serve immediately while hot.