Why the curve has two ends
Squid muscle is unusually rich in collagen arranged in tight cross-linked sheets. Heat makes those fibres contract quickly and hard, which is what happens within the first couple of minutes and why it goes from tender to tough so fast.
That collagen then behaves like collagen anywhere else: given enough time and moisture it converts to gelatine and the flesh becomes tender again. That takes thirty to forty-five minutes of gentle simmering.
So there are exactly two correct approaches — very fast, or long and slow — and the failure is landing between them.
The two right answers
- Fast
- Ninety seconds to two minutes in a very hot pan, on a grill, or in hot oil. Rings, strips or scored pieces.
- Slow
- Thirty to forty-five minutes at a bare simmer, in wine, tomato, stock or its own ink. Whole or in large pieces.
- Wrong
- Five to twenty minutes. This is where almost all rubbery squid is made.
- Frozen squid
- Freezing damages the cell structure and genuinely tenderises it. Frozen-then-thawed squid is often better than fresh for fast cooking.
- Size
- Small squid suit fast cooking; large ones suit braising.
Cooking it fast
- Clean it and dry it very thoroughly. Wet squid steams and never colours.
- Score the body in a fine criss-cross on the inside face if you want it to curl attractively, cutting no more than halfway through.
- Cut into rings or into pieces roughly the size of a large stamp.
- Get the pan or oil genuinely hot before anything goes in.
- Cook in small batches. Squid releases water and a crowded pan boils it, which lands you squarely in the rubber zone.
- Ninety seconds to two minutes, no more. It should be just opaque with some colour.
- Season and dress it immediately — lemon, chilli, parsley, garlic.
Rescuing rubbery squid
This one genuinely can be saved, which is unusual.
- Keep cooking it. Add liquid — wine, stock, chopped tomatoes — cover, and simmer very gently for another thirty to forty-five minutes.
- It will come back. The collagen converts and the squid becomes tender and silky.
- Expect it to shrink considerably and to change character. It is now a braise rather than a fry.
- Serve it with the sauce it made, over polenta, pasta or bread.
- Do not turn the heat up to speed it. A hard boil tightens it further.
Cleaning a whole squid
Two minutes each, and whole squid is cheaper, fresher and better than prepared rings.
- Pull the head and tentacles away from the body. The innards come with them.
- Cut the tentacles off just below the eyes and keep them. Squeeze out the small hard beak from the centre and discard it.
- Pull the clear plastic-like quill out of the body and discard it.
- Peel the purple membrane off the body with your fingers. It comes away in sheets under running water.
- Pull off the two side fins and keep them — they are good eating.
- Rinse the body inside and out, and check nothing is left inside.
- Slice into rings, or split the body open flat, score the inside in a diamond pattern and cut into pieces, which curl attractively and cook faster.
- Keep the ink sac if it is intact and you want it, though most squid sold in the UK has already lost it.
Common questions
Why is my calamari rubbery?
It was cooked for between about two and thirty minutes, which is the range that toughens it.
Can I rescue it?
Yes, unusually. Add liquid, cover, and simmer gently for another thirty to forty-five minutes until it is tender again.
Is frozen squid worse than fresh?
Not for fast cooking. Freezing damages the cell structure and tenderises it, and frozen squid is often better.
How long exactly for frying?
Ninety seconds to two minutes in genuinely hot oil, in small batches.
Does soaking in milk help?
It is a common practice and its effect is modest. Drying the squid thoroughly matters far more.
Try this next
- Squid buying and cleaning it
- Rubbery prawns the same word, a different mechanism
- Collagen conversion to gelatin why the slow route works
- Braising the slow method