Lobster is one of the most expensive proteins you will ever cook, and it is also one of the easiest to ruin. The meat tightens and turns rubbery within seconds of overcooking - a mistake that costs $30+ per tail. Sous vide eliminates that risk entirely. At 135°–140°F for 40–45 min, lobster tails come out butter-tender, sweet, and translucent - the texture that high-end steakhouses charge a premium for. The biggest advantage over boiling or steaming is moisture retention. Traditional methods cook lobster in rapidly moving water that leaches flavor. The sealed bag keeps every drop of the lobster's natural juices in contact with the meat. Add butter directly to the bag for built-in butter-poached lobster. The butter infuses during cooking, eliminating the need for a separate poaching step. After the bath, a quick 30-second sear in clarified butter adds golden color and nutty flavor without overcooking the delicate interior. This guide maps doneness targets to texture so you get sweet, bouncy lobster - never rubbery, never tough.