Preheat oven to 425°F (220°C)
Scrub potatoes clean and dry them
Pierce each potato 6–8 times with a fork
Rub potatoes with olive oil (optional) and sprinkle with salt
Bake directly on the oven rack or on a baking sheet
Bake until tender: about 45–60 minutes for medium potatoes; 60–90 minutes for large potatoes
Check doneness by squeezing gently (should give easily) or inserting a knife (should slide in easily)
Let rest 5–10 minutes before cutting
Slice lengthwise, fluff the inside with a fork, and add toppings (butter, sour cream, cheese, chives, salt, pepper)
