Crackling cornbread is a specific Southern Black tradition. Commercial pork rinds share little with that tradition beyond the base ingredient.
What it does
Commercial pork rinds are high in sodium (500–700 mg per oz) and saturated fat. Traditional home cracklings from fresh pork skin are higher in fat but lower in sodium.
How it is cooked
Crackling cornbread: fold small pieces into standard cornbread batter — the fat content is distributed across the whole pan.