Cau cau de mariscos is a variation on the typical Peruvian stew cau cau. It's usually made with a combination of scallops, octopus, shrimps, onions, garlic, hot peppers, oil, potatoes, carrots, fish stock, mint, salt, and pepper. The onions, garlic, and hot peppers are sautéed in oil and mixed with potatoes, carrots, and fish stock.

The mixture is simmered until the potatoes are tender. The octopus, shrimps, and scallops are added to the pot and cooked over low heat. Mint is stirred into the stew and it's then served with Peruvian-style white rice on the side. If desired, snails can also be added to the stew.