Cooking potatoes in the oven without covering them with foil can result in a delicious crispy texture on the outside. The cooking time will depend on the size of the potatoes and the oven temperature. Here's a general guideline for cooking whole, unpeeled potatoes in the oven without foil:
Preheat your oven to 400°F (200°C).
Scrub the potatoes thoroughly to remove any dirt, and then dry them with a paper towel.
Pierce each potato a few times with a fork to allow steam to escape during cooking.
Place the potatoes directly on the oven rack or on a baking sheet lined with parchment paper (to catch any drippings).
Bake the potatoes in the preheated oven for approximately 45 minutes to 1 hour, depending on their size. You can check for doneness by inserting a fork into the thickest part of a potato; it should go in easily with no resistance.
Once the potatoes are fully cooked, remove them from the oven and let them cool slightly before serving.
Remember that larger potatoes will take longer to cook, while smaller ones will cook more quickly. Adjust the cooking time accordingly based on the size of your potatoes.
Additionally, if you prefer a softer texture or want to speed up the cooking process, you can cut the potatoes into smaller pieces or wedges. This will reduce the cooking time compared to baking whole potatoes. Just keep an eye on them to avoid overcooking.