Preheat the griddle to medium-high heat, about 375 to 400°F.
Scrub the potatoes thoroughly, dry them, and pierce each several times with a fork.
Rub the potatoes with olive oil, salt, and black pepper, then place them directly on the hot griddle.
Cook for 45 to 60 minutes, turning occasionally for even cooking, until a fork slides easily into the thickest part and the centers reach about 205 to 210°F.
Remove with tongs, rest for 5 minutes, then split and fluff the centers before serving.
Notes
The source is a cooking guide rather than Recipe JSON-LD; its stated potato type, oil, seasoning, 375–400°F heat, 45–60 minute timing, and doneness cues form one coherent publishable recipe fallback.