I've always seared my steaks on the grill so not an expert at the cast iron pan method. But just thinking out loud, I would drop the oil and use the butter only, making sure the butter is seasoned/flavored with salt and pepper/herbs etc.
__________________
2021 X3 M40i
1974 2002tii, Inka, 5 sp manual
BMWCCA # 327475
|