Shaykh Ibn Uthaymeen was asked,
“What is the ruling on eating food which is cooked in something of pork fat?
“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”. End translation. [‘Ilaam al-Musaafireen (pg. 92)]
Faisal bin Abdul Qaadir bin Hassan