- 4 large russet potatoes
- 2 tablespoons vegetable oil
- 3/4 cup sour cream
- ¼ cup unsalted butter
- ¼ cup finely chopped fresh chives
- 1 tablespoon finely chopped fresh tarragon (optional)
- Kosher salt and freshly ground black pepper
Place a rack in middle of oven; preheat to 425°. Poke potatoes all over with a fork; rub with oil. Bake directly on oven rack until very soft when squeezed and skins are crisp, 50-60 minutes. Let cool just until you can hold them.
Using a serrated knife, slice potatoes in half lengthwise and scoop flesh into a medium bowl. Add sour cream, butter, chives, and tarragon (if desired); season generously with salt and pepper.
Divide among 4 potato skin halves, piling generously high but don’t pack too tightly.
Increase oven temperature to 450°. Bake potatoes on a rimmed baking sheet until filling is puffed and browned in spots, 20-25 minutes.