Shaykh Ibn Uthaymeen was asked:

Question:

What is the ruling on eating food which is cooked in something of pork fat?

Answer:

“It is not allowed to eat it. Whatever is changed by this fat, then it is impure and it makes the clothing, body, and vessels impure”.

[‘Ilaam al-Musaafireen (pg. 92)]

Translated by

Faisal bin Abdul Qaadir bin Hassan
Abu Sulaymaan