A batta tin is used for making battas in the gnome restaurant minigame. It can be obtained in the Grand Tree by buying from the Gnome Restaurant food shop owned by Hudo, by searching the nearby cupboard to find one, or by looting it from the gnomes in the stronghold. This way takes much longer because it rarely drops, so it is not recommended.
If one Gianne dough is added into the tin and cooked over the Gnome Cooker or any other range, a half baked batta will made. From here, any of the battas in the gnome cuisine can be made. Examples of battas include worm Batta, toad batta, cheese and tomato batta, fruit batta, and vegetable batta.
Please see Gnome Cooking for more information on gnome cuisine.