How long do prawns in shells take to cook?
Use prawns with their heads left on, but their intestinal tracts removed. Bring a large pan of salted water to a steady boil, drop in the prawns, and simmer until they change colour (about 3-4 minutes) . Drain from the water and serve.
Why do cooked prawns stick to shell?
The soft inside of the shrimp has fiber-like proteins. So when it’s cooked, the proteins heat up and become very sticky. They stick to the shell as hard as possible. This is the reason cooked shrimp shells are hard to peel.