I had read somewhere online that you could make mayonnaise from lard. And indeed, you can. But, just because you can do something, doesn't mean you should. The thing is, it didn't taste too bad right when we made it, when it was warm. I thought it was a bit strong but okay. But then we refrigerated it, and used some of it later. It was disgusting, for lack of a better word. I'm not sure why, but I suspect it may be because when there's a lot of fat in a food, it's usually better heated up.
So, if you're thinking about trying it, I wouldn't.