I typically cook raw prawns in boiling water for around 3 minutes. If they go over a little bit longer they can tend to become rubbery.

Is there a minimum/optimum time a raw prawn should be boiled?

  • 6
    Boiled?!?!?!?!?! Jun 12, 2011 at 14:04
  • 1
    @ElendilTheTall - If you drop something in boiling water for 3 minutes, what else would you call it?
    – Bill
    Jun 13, 2011 at 0:35
  • I guess he knows what boiling is but finds it strange to BOIL prawns. Usually they are not boiled but prepared in a pan. Fried. Roast. Pan-fried. Broiled. Sauteed...
    – eckes
    Sep 28, 2015 at 17:38
  • 2
    @eckes - Prawn/shrimp "cocktail" is one of the most widespread and well-known dishes/appetizers that use the ingredient. Boiled. May 31, 2017 at 15:43

2 Answers 2


There is an optimal temperature to which they must be cooked, independent of method (boiling, frying, whatever). This temperature is 50 deg. C. (This is lower than safety guidelines; if you want to eliminate the foodborn illness risk, you must eat rubbery seafood). Once the inner temperature of seafood has risen above that, its proteins undergo an irreversible change called denaturation, which changes the texture.

The time needed for reaching this temperature varies a lot. It depends on the size of the prawns, their initial temperature, the temperature of your water, on the total mass of water in the pot and on the total mass of prawns in the pot.

If you find it impractical to impale a prawn on a digital thermometer every time you cook, you need to experiment. Keep the variables I mentioned constant, and boil prawns for different times. Find out how much they need before they go rubbery, and then stick to it, keeping all the other variables constant. In your case, this will probably correspond to the three minutes you mention. For somebody else, who boils a different amount of prawns per batch, it will be different.

There is no minimal time, just as there is no maximal time. The minimal temperature for them to taste cooked is 45 degrees C., but you can eat them at lower if you don't mind them tasting raw. You can find the minimum time for your case as described above. The legal minimum temperature for US food safety is 63 degrees. You can't legally approximate it by time, you must use a thermometer, or, at home, you can go much above it just to make sure - when seafood turns stiff and dry, you can be sure that it has reached 70 degrees.

  • 2
    If you can snap it like a biscuit, you've probably gone too far :)
    – Bruce
    Jun 14, 2011 at 11:51
  • @Bruce - made me laugh out loud
    – Bill
    Jun 15, 2011 at 13:02

I usually see to check if the prawns have curled and turned to a faint pink from the original light shade.

  • Though a useful tip, it doesn't actually address the OP's question.
    – razumny
    Mar 7, 2014 at 10:39

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