How to Thaw and Cook Frozen Seafood: A Singapore Guide

“Fresh” seafood is not always fresher than frozen. Most seafood sold as “fresh” at a counter was caught days earlier and kept on ice through transport and display. Flash-frozen seafood is frozen within hours of the catch, at peak freshness, locking in flavour and texture at their best. The difference you taste at home comes down far less to fresh-versus-frozen than to two things you control: how you thaw it, and how you cook it.

Why flash-frozen works

Freezing quickly, at very low temperatures, forms tiny ice crystals that do little damage to the flesh. Slow freezing — the kind that happens in a home freezer — forms large crystals that rupture cells, which is why slowly-frozen seafood thaws watery and soft. Commercial flash-freezing avoids that. It is the same method premium restaurants rely on.

The golden rule of thawing

Thaw slowly, in the fridge. Move the seafood from freezer to fridge the night before you cook it. Slow thawing keeps the texture intact and is the safest method.

The quick method, when you forgot. Seal the seafood in a leak-proof bag and submerge in a bowl of cold water. Change the water every 15 minutes. Most portions thaw in 30–60 minutes. Cold water only.

Never thaw seafood at room temperature, and never use warm or hot water. Both push the surface into the range where bacteria multiply while the centre is still frozen, and both wreck the texture.

Approximate fridge-thaw times

• Prawns: 6–12 hours
• Salmon fillets / portions: 8–12 hours (overnight)
• Scallops: 6–10 hours
• Clams / mussels: cook from frozen or thaw 6–8 hours
• Squid: 8–12 hours

How to cook salmon

Our frozen seafood delivery in Singapore includes Chilean salmon — rich, clean and versatile. Pan-searing gives the best result:

1. Thaw, then pat very dry. Season with salt.
2. Heat a pan over medium-high with a little oil. Lay the salmon skin-side down and press gently so it stays flat.
3. Cook skin-side down for most of the time — about 4–5 minutes — until the flesh turns opaque most of the way up. Flip and cook 1–2 minutes more.
4. Salmon is best slightly translucent in the centre, around 50–52°C. For fully cooked through, take it to 60–63°C. Do not overcook.

How to cook prawns

1. Thaw and pat dry. Season.
2. Get a pan or wok hot with a little oil. Add the prawns in a single layer.
3. Cook 1–2 minutes per side, until pink and curled into a loose C-shape. A tight O-shape means overcooked.
4. Remove immediately — they keep cooking off the heat.

How to cook scallops

Scallops live or die on a dry surface. Wet scallops steam grey; dry scallops sear golden.

1. Thaw, then pat completely dry with several changes of kitchen paper. Season lightly.
2. Heat a pan until properly hot with a thin film of oil. Lay the scallops in, not touching.
3. Sear undisturbed 1.5–2 minutes until golden, then flip and cook 1–1.5 minutes more. The centre should stay just translucent.
4. Do not crowd the pan, or they steam instead of searing.

How to cook clams and mussels

1. If clams need purging, soak in salted water 20–30 minutes, then rinse.
2. Cook in a hot pan with aromatics — garlic, ginger, a splash of stock or wine — covered, until the shells open.
3. Discard any shells that stay shut after cooking.

Clams, mussels and prawns are naturals for the pot — see our steamboat guide for a full hotpot spread.

Cooking from frozen

Prawns and clams cook well from frozen with a couple of extra minutes. Salmon can be cooked from frozen too: start it skin-side down, covered, on a lower heat to thaw through, then finish uncovered. Thawed-then-cooked gives slightly better texture, but cooking from frozen is a good backup.

Food safety, briefly

• Do not refreeze raw seafood once thawed. Cook it first, then you may freeze the cooked dish.
• Keep thawing seafood on the bottom shelf of the fridge so it cannot drip onto other food.
• Cook thawed seafood within a day or two.

Ready to cook?

Browse our frozen seafood delivery in Singapore — Chilean salmon, tiger and king prawns, scallops, mussels, clams and more, flash-frozen at peak freshness and delivered cold. Free delivery on orders above S$65.