Preheat oven to 400°F. Prick potatoes with a fork and place them on a baking sheet. Bake for 45 minutes then let cool for 10 minutes.
Cut potatoes in half lengthwise and, using an oven mitt or towel to protect your hand, scoop the potatoes out of their skins into a large bowl. Set the skins on the baking sheet, scooped-out sides facing up.