"Duck fat" just sounds sexy. Say it out loud, in your lowest bedroom voice -- I'll wait...see?? Doesn't it sound naughty :) It's a wonderful fat. Bacon fat and duck fat are the yin to the potatoes yang. You can't go wrong with either of them. I have to buy my duck fat because I don't cook down enough ducks on the regular to make my own. This deliciously sinful tub of bird fat cost me about $6 from Wegmans and a little goes a long way. You only need about 2 tablespoons of it for all of these potatoes. They soak up the duck fat and get amazingly crisp and super golden brown.