To cook pork loin in the oven, the general guideline is to roast it at around 350°F (175°C) until the internal temperature reaches 145°F (63°C), which ensures it is safe and juicy.

Cooking Time and Temperature

• Preheat oven to 350°F (175°C).
• Roast the pork loin for about 20 minutes per pound of meat. For example, a 4-pound pork loin would take approximately 80 minutes.
• The pork is done when an instant-read thermometer inserted into the center reads 145°F (63°C).
• After removing from the oven, let the pork rest loosely covered with foil for about 10 minutes to allow juices to redistribute

Alternative Method with Initial High Heat

• Preheat oven to 400°F (204°C).
• Cook the pork loin fat side up for 10 minutes at this high heat to create a crust.
• Then reduce the oven temperature to 350°F (175°C) and continue cooking for about 20 minutes per pound until internal temperature reaches 145°F.
• Rest the meat for 10 minutes before slicing

Another Approach

• Start at 425°F (218°C) for 15 minutes.
• Reduce heat to 375°F (190°C) and roast for another 40-60 minutes depending on size.
• Check internal temperature for 145°F and rest for 5-10 minutes before serving

Summary

Step| Temperature| Time| Notes
---|---|---|---
Preheat and initial roast| 350°F (175°C)| ~20 minutes per pound| Until internal temp 145°F
Or initial high heat then roast| 400°F (204°C) then 350°F (175°C)| 10 min high heat + 20 min per pound| Fat side up, rest 10 min
Or high heat then lower heat| 425°F (218°C) then 375°F (190°C)| 15 min + 40-60 min| Check temp early, rest 5-10 min

Using a meat thermometer is essential for perfect results and avoiding overcooking