Long story short: I made a bunch of meatloaf and I forgot to buy butter. I need to make gravy.
The way I usually make gravy is to melt some butter, to supplement whatever drippings I have, make a roux and add some broth – chicken or beef, depending on what the gravy is to be served with – to get to the desired viscosity.
But I forgot to buy enough butter. Can I use olive oil? Is there another way to make gravy from scratch without drippings?