Exact proportions are just not necessary to make these, you can bake as many potatoes as you need and top them off with as much or as little sour cream, green onions and cheese as you'd like.
Wash the potatoes and wipe with a paper towel. Rub each potato with olive oil and sprinkle with kosher salt all over.
Preheat your oven to 350F and bake uncovered until the potatoes are fork soft (about 60-90min)
3. Cut each potato in the middle without cutting it all the way through, lightly season with salt on the inside, add a slice of butter (salted or unsalted) and using a fork scrape the sides of the potato and carefully mix it with the salt and butter.
4. Top the potato with a good spoon of sour cream, following with chopped spring onions and finishing off with cheese if desired.