Using kitchen scissors, cut down the top of the lobster shell.
Gently pull the meat up and rest it on top of the shell.
Pat dry with paper towels.
Preheat oven to 400°F. Place lobster tails on a baking sheet. Brush generously with the garlic butter sauce.
Bake for 10–12 minutes, brushing again halfway through. Lobster is done when the meat is opaque and slightly firm.