1. Prep the Duck Legs
Pat the duck legs with paper towels to dry. Use a needle, the tip of a metal skewer, or a sharp knife to prick each leg. Prick them all over, piercing the skin but not the meat. This helps to ensure a crispy skin.
Arrange the legs in a baking dish that has been lightly oiled with a neutral oil or duck fat. The dish should be just large enough to fit them comfortably.
Sprinkle 1 teaspoon of kosher salt over each leg.
2. Bake the Duck Legs
Place the duck legs in a cold oven and set the temperature to 300°F.
Bake for 2 hours. When done, the legs should be partially submerged in their melted fat, and the skin should be starting to look crispy.
Increase the oven temperature to 375°F and cook for 15 minutes or until golden brown and the skin is crisp.
Serve the duck legs immediately, or remove them from the fat and refrigerate for later.