It is forbidden to Muslims to eat any food certainly mixed with what is forbidden like pork. In case of doubt about it then the food is permissible to eat, because the normal ruling is that things are permissible.

Eating Food Mixed with Traces of Pork

Similar Questions 

· Mixing food with a little pork.
   · Cooking food in saucepans used for pork.

The Issue

A Muslim living in a non-Muslim country may encounter the problem of food being available that has been mixed with traces of pork, such as when the tools used for slaughter are used for pigs and sheep, or the food might have been boiled or fried in utensils that have been used to boil or fry pork. Alternatively lamb or beef may be cooked on a tray where pork or ham have been cooked, as happens in many restaurants. Is such food permissible to eat?

Ruling

If a Muslim is certain that the food has been contaminated with pork, it is not permissible to eat unless it is washed. If he is not certain then it is permissible to eat. This is the view of the Permanent Committee for Research and Fatwa and the late Shaikh Muhammad ibn Uthaymeen, as well as other contemporary scholars.

Evidence

In such situations, what is permissible has certainly been mixed with what is forbidden. Therefore, if it is eaten it means that something forbidden has been eaten. If the case is uncertain and there is doubt about it then the food is permissible to eat, because the normal ruling is that things are permissible and cannot become forbidden on the basis of mere doubt.

Sources 

· Fatawa by The Permanent Committee for Research and Fatwa.
   · Fatawa al-Aqaliyyat al-Muslimah, by a group of scholars.
   · Mut’ib al-Qahtani (ed.), Is'af al-Mughtaribin bi Fatawa al-'Ulama’ al-Rabbaniyyin.