OVEN: Preheat your oven to 425F (220C). AIR FRYER: Preheat your air-fryer to 400F (200C).
Pierce the potatoes all over with a fork so steam can escape. Optionally, you can lightly rub the potatoes with a bit of olive oil over the skin. OVEN: Place the potatoes on a baking tray and bake 45 - 60 minutes or until the skin is crisp and the potato is fork-tender.AIR FRYER: Place the potatoes in a single layer in the air fryer and bake 35 - 48 minutes or until the skin is crisp and the potato is fork-tender.
Cut a slit down the middle of the potato, (careful, it's hot!), then using a towel or oven mitts, push the ends towards each other and the potato will pop open nicely. Fluff the insides with a fork. Top with a pat of vegan butter if desired.
Notes
Oil-free: to make oil-free simply omit the oil and vegan butter.