Preheat the oven to 400 degrees F. Run the potatoes under cold water, scrubbing with fingers or a small brush, until clean. Poke holes all around the potatoes using a fork.
Rub approximately 1 tablespoon of olive oil over the entire surface of each potato. Coat with seasoned salt and place in the center of a rimmed baking sheet. Bake in the preheated oven for 1 hour, or until a knife or fork can be easily inserted into the centers.
Remove the potatoes from the oven and let sit for 5-10 minutes before serving. Cut down the center lengthwise and serve with butter.