How to Bake Sweet Potatoes

  1. 1

    Preheat oven to 200°C

    A hot oven crisps the skin and caramelises the natural sugars. Lower temperatures work but take significantly longer and do not produce the same caramelised skin.

  2. 2

    Scrub, prick and oil

    Scrub sweet potatoes under running water — you can eat the skin and it should be clean. Pat dry. Prick all over with a fork or sharp knife (15–20 times) to allow steam to escape and prevent bursting. Rub lightly with olive oil or vegetable oil. Sprinkle with a pinch of salt.

  3. 3

    Place directly on the oven rack — no foil

    Place the sweet potatoes directly on the middle oven rack with a baking tray on the rack below to catch any drips. Do not wrap in foil — foil traps steam and makes the skin soggy rather than caramelised. Direct oven heat on the skin creates the best texture.

  4. 4

    Bake 45–60 minutes

    Timing depends on size: small (150g): 40 minutes. Medium (250g): 50 minutes. Large (350g+): 60–70 minutes. The sweet potato is done when a knife or skewer slides into the thickest part with no resistance. The skin will be slightly crisp and caramelised, often with some sugar leaking and darkening on the tray.

  5. 5

    Slice and serve

    Cut lengthways and push the ends to open. The flesh should be soft, fluffy and steaming. Top with butter, sour cream, cheese, black beans, or simply salt and pepper.

Serving Ideas

  • Classic: butter, salt, a drizzle of honey
  • Savoury: sour cream, chives, crispy bacon
  • Loaded: black beans, salsa, avocado, coriander
  • Asian: miso butter, sesame seeds, spring onion
Microwave shortcutFor a weeknight shortcut: prick the sweet potato, microwave on high for 5–6 minutes, turning halfway. The skin will not caramelise and the texture is slightly denser, but it is fully cooked in minutes. Finish in a hot oven for 10 minutes to crisp the skin if desired.

Frequently Asked Questions

Both work but produce different results. Baking concentrates the natural sugars through caramelisation, creating a sweeter, richer flavour and drier, fluffier texture. Boiling produces a softer, wetter result — good for mashing, soups and baby food but lacks the caramelised depth of baking. For maximum flavour as a side dish, bake. For mashing or adding to curries and soups, boiling or steaming is faster and more practical.
The most reliable test: insert a sharp knife or skewer into the thickest part — it should slide through with zero resistance. Visual signs: the skin will be wrinkled and caramelised, sugar may have oozed and darkened on the tray, and the sweet potato may have shrunk slightly. If in doubt, give it another 10 minutes — an overbaked sweet potato is still delicious.