Roux using the grease you skimmed off your gumbo?

Where did all the "grease" come from?

grease is grease is grease, you can make a roux with butter if you want. using bacon grease is a great roux.

chicken fay, pork fat, even straight water can be used.

you just need something to keep the flour from sticking to the pot

I usually skim the fat with a (several) paper towel, so that would not work for me. I understand I am throwing away flavor when I do that.