"It starts with the world's best cornbread!..."
Cooking spray, for pan
yellow cornmeal
all-purpose flour
packed brown sugar
baking powder
baking soda
kosher salt
whole milk
buttermilk
large eggs
melted butter, cooled slightly
butter, plus more for pan
large onion, chopped
stalks celery, chopped
Kosher salt
Freshly ground black pepper
cloves garlic, minced
freshly chopped sage
fresh thyme leaves
eggs
low-sodium chicken broth
Freshly chopped parsley, for garnish