M&S Battered Chunky Cod Fillets Frozen Frozen for convenience, these chunky cod fillets are coated in a light golden crispy batter. Simply bake in the oven. Four per pack. Our M&S seafood products have been sourced from fisheries and fish farms in a way that minimises their ethical and environment impact, while guaranteeing you the highest quality, delicious seafood you’d expect from M&S.