Definition of carbuncle for English Language Learners. : 1  a large painful swelling under the skin. : 2  a jewel (such as a garnet) that is cut into a rounded shape.
For a 12-14 lb (5.5-6.5 kg) turkey: Cook for 40 minutes then reduce the temperature to gas mark 3, 325 F (170 C) and cook for a further 3-31/2 hours. Then give it a final 30 minutes (uncovered) at gas mark 6, 400 F (200 C).
Confidence votes 10.4K. 1.5kg equals 3.3lbs turkey should be cooked for 20 minutes per pound and 20 minutes should be added to the total cooking time. So at least 1hour and 20 minutes should see the turkey cooked! 12 pound turkey crown should cook in the oven for at least 3  hours. The turkey should cook at a temperature of 325 degrees. 1 person found this useful. Edit.