Bone in, 4 hours at 135° F in sous vide water bath. I normally would have used my Neovide 100 bagless and waterless sous vide cooker for these, but I put them into the water bath that I was using to cook a couple pounds of bacon. I like to precook bacon for up to 12 hours and drain off the fat to use separately.
All of the meat I buy from Good Chops comes in sous vide ready packaging, which is very convenient.
After refrigerating the precooked lamb cops overnight I browned them for a few minutes on each side in the Crownful countertop air fryer. Tender and tasty.