It's a mixture of whipped animal fat and... whatever you have lying around, basically. Usually something sweet, which you think wouldn't go well with it, but it absolutely does. You can make it with meat or berries depending on what you want it to taste most like, so if you think you'd like something savory a little better, it's definitely a good choice.

...I suppose you can make it with shortening, too, which is what I did, but it's definitely not as good. That... might just be me, though.