how long to cook a pork tenderloin at 350
How long to cook a 3 lb pork shoulder roast in the oven? I cook meats 20 - 30 minutes per pound at 350F(190C). so a 3 pound shoulder I would cook 1 to 1 1/2 hours in a roasting pan with a bit of water.The fat under the skin shoul â¦ d be mostly melted away when it is done. cook meats 20 - 30 minutes per pound at 350F(190C). so a 3 pound shoulder I would cook 1 to 1 1/2 hours in a roasting pan with a bit of water. The fat under the skin shoul â¦ d be mostly melted away when it is done.