How Long to Cook a 1.5 kg Joint of Beef for Perfect Doneness

Learn the exact oven temperature and cooking time to roast a 1.5 kg joint of beef medium or well-done.

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To cook a 1.5 kg joint of beef, roast it in the oven at 240°C (475°F, gas mark 9) for 20 minutes. Then, reduce the temperature to 190°C (375°F, gas mark 5) and continue cooking for 15 minutes per 500g for medium, or 20 minutes per 500g for well-done beef. This means for a medium 1.5 kg joint, you'd cook it for an additional 45 minutes, and for well-done, an extra 60 minutes after the initial 20-minute blast.

FAQs & Answers

  1. What oven temperature is best for roasting a 1.5 kg joint of beef? Start roasting the beef at 240°C (475°F, gas mark 9) for 20 minutes, then reduce the temperature to 190°C (375°F, gas mark 5) for the remainder of the cooking time.
  2. How long should I cook a 1.5 kg joint of beef for medium doneness? After the initial 20 minutes at high heat, cook the beef at 190°C (375°F) for 45 minutes to achieve medium doneness.
  3. How do I cook a well-done 1.5 kg joint of beef? Roast the beef at 240°C for 20 minutes, then lower the oven temperature to 190°C and cook for an additional 60 minutes for well-done meat.
  4. Can I use gas marks instead of Celsius to roast beef? Yes, gas mark 9 corresponds to 240°C (475°F) for the initial roasting, and gas mark 5 corresponds to 190°C (375°F) for the continued cooking.

Watch More

For more expert cooking tips, check out our guides on how to carve roast beef perfectly and how to make the best homemade gravy to complement your roast dinner.

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