All gammon joints should be boiled for at least part of their cooking time. They will first need soaking, then boiling for 15 minutes per 450 g (1 lb) and only then, minus their rind and coated with a lovely rich glaze, are they ready to go into the oven.
As the joints increase in size, so they need fewer minutes in the pot for every 450 g (1 lb); the chart will help whatever the size of your joint, and these can vary from 450 g (1 lb) or so up to 9 kg (20 lb) or even more for a whole gammon:
| 450 g (1 lb) |
allow 45 minutes |
| 450g-1.5 kg (1-3 lb) |
allow 1-1½ hours |
| 1.2-2.7 kg (3-6 lb) |
allow 30 minutes
per 450 g (1 lb) |
| 2.7-4.5 kg (6-10 lb) |
allow 3-3½ hours |
| 4.5-6.3 kg (10-14 lb) |
allow 3¾–3¼ hours |
| 6.3-8.1 kg (14-18 lb) |
allow 3¾-4¼ hours |
| 8.1-9.5 kg (18-21 lb) |
allow 4¼-4½ hours |