Preparation

• 将架子放在烤箱的中心，然后将烤箱加热到400°F。将土豆直接放在烤箱架上，烘烤直到用叉子刺穿，大约1小时10分钟。将土豆转移到切菜板上，静置直到足够冷却到达，大约10分钟。
• Meanwhile, melt the butter in a medium skillet over medium high heat. Add the mushrooms, garlic, thyme, rosemary, and 1/4 tsp. salt and cook, stirring, until the mushrooms have browned and all the liquid has evaporated, about 8 minutes.
• Cut a 1/2-inch-thick slice lengthwise off the top of each potato; scrape the flesh from the slices into a large bowl and discard the skins. Spoon the flesh from the potatoes into the bowl, leaving a 1/4-inch shell. Add the butter, 3/4 tsp. salt, and 1/2 tsp. pepper and mix with a potato masher until blended; do not overwork (lumps are OK). Gently fold in the mushroom mixture, crème fraîche and half of the cheese with a silicone spatula. Season to taste with more salt and pepper.
• Using your fingers, rub the outsides of the potato shells with the oil. Distribute the filling among the shells, mounding it, and place on a rimmed baking sheet.
• Bake the potatoes, uncovered, until heated through, 25 to 30 minutes. (To check, insert the blade of a small knife into the center of a potato for 5 seconds; it should be hot.) Sprinkle the potatoes with the remaining cheese and bake until the cheese melts and browns lightly in some places, 2 to 3 minutes more. Garnish the potatoes with the chives, let sit 5 to 10 minutes, and serve.

Make Ahead Tips

土豆可以烘烤，并提前1天填充。用保鲜膜和冷藏盖。在进行最终烘烤之前，将它们带到室温并将烤箱加热到400°F。

Twice-Baked Potato Halves: After the first bake, halve the potatoes lengthwise. Scoop the flesh out of both halves, leaving a 1/4-inch shell. Make the filling, then fill both halves of each potato, bake, and finish as directed.