Preheat your oven to 400°F (204°C). Make sure your oven's metal rack is in or near the middle level.
Take out 4-6 large russet potatoes and rinse them with warm water. Carefully poke 7-10 sets of holes on the potatoes with a fork for ventilation.
Take a basting brush. Use it to coat the potatoes in a thin layer of olive oil, then season them with salt and pepper, and wrap each potato tightly in aluminum foil, but leave a little bit of air out for ventilation. The foil helps the potatoes heat up faster and prevents future cleanup.
Place all potatoes on a baking sheet, making sure it is large enough to fit all of the potatoes. Place the sheet in your preheated oven,
Bake for one hour, or until the potatoes are soft. Bigger russet potatoes take around 60 minutes to cook while smaller ones take around 45 minutes.
When the time has passed, remove the baking sheet from your oven, and coat each potato with olive oil once again. Raise the metal rack in your oven one level up.
Put the baking sheet in your oven, and bake for another 10 minutes.
Once finished, take out the baking sheet and cut open the potatoes to add toppings. Put in as much as toppings as your potato will have space for. Wait until the baked potatoes to cool before serving.
(Alternative Step) Skip steps 4-7 if you are using an air fryer. Instead, bake your potatoes for 45 minutes at 400°F (204°C), making sure to flip the potatoes halfway through. Take them out when they become soft and crispy.