how long do you broil lobster
1 Cover the pot with a lid. 2  The length of time you boil the lobsters differs according to how much they weigh. A one-pound lobster should cook for 3 1/2 minutes, a 2-pound lobster for 5 1/2 minutes, and a 3-pound lobster for 7 1/2 minutes.  Submerge the parboiled lobster in an ice bath to stop the cooking.