The cooking time for a beef chuck roast in the oven can vary depending on the weight of the roast and the desired level of doneness. As a general guideline, you can follow these cooking times at an oven temperature of 325°F (160°C):
- Rare: Cook for approximately 20 minutes per pound.
- Medium: Cook for approximately 25 minutes per pound.
- Well done: Cook for approximately 30 minutes per pound.
However, it's essential to use a meat thermometer to check the internal temperature of the roast and ensure it's cooked to your preference:
- Rare: 125°F (52°C)
- Medium-rare: 135°F (57°C)
- Medium: 145°F (63°C)
- Medium-well: 155°F (68°C)
- Well-done: 160°F (71°C) or higher.
Remember that cooking times can vary based on your oven and the specific characteristics of the roast, so always use the internal temperature as the most reliable indicator of doneness. Additionally, for more tender results, you may want to consider cooking the chuck roast low and slow at a lower temperature for an extended period.