Pork Roast

A raw pork roast keeps 3–5 days refrigerated. Store it on the bottom shelf in a pan that catches any leakage.

Pork roasts freeze well — 4–12 months at good quality — with the same advantage as beef roasts: low surface area relative to mass means less exposure to the air that causes freezer burn. Fattier cuts like shoulder sit at the lower end of that range, since the fat oxidizes regardless of how cold it is.

Thaw in the refrigerator and allow one to three days depending on size. Cook to 145°F with a three-minute rest for loin and other lean roasts. Shoulder and other collagen-rich cuts are usually taken far past that to around 195°F, not for safety but because the connective tissue needs the heat to break down.

Pork roast spoils as any whole-muscle cut does, from the surface inward, and its interior is effectively sterile until cut. The lowered USDA recommendation of 145°F reflects the near-total elimination of Trichinella from commercial US pork; slightly pink pork is done, not dangerous.

Pork's spoilage smell is distinctly sulfurous rather than simply sour, from bacteria breaking down sulfur-rich amino acids. It is unmistakable once you have met it.

Two normal things get mistaken for spoilage. Vacuum-sealed pork often smells faintly metallic or sour for the first minute after opening — confinement odor that dissipates with air and is not a problem. And fattier roasts sometimes show a slight iridescent sheen on cut surfaces, which is optical rather than biological.

What is not normal: a smell that persists or strengthens after airing, a slimy or sticky film, and gray-green patches. Any of those means discard.