Vegetables
How Long to Cook Sweet Potato
A medium sweet potato takes 45–55 minutes at 400°F in the oven, 35–40 minutes in the air fryer, or 5–6 minutes in the microwave.
Cooking Times by Method
| Method | Temperature | Time |
|---|---|---|
| Oven | 400°F / 200°C | 45–55 minutes (whole) | cubes: 25–30 min at 425°F |
| Air Fryer | 390°F / 200°C | Whole: 35–40 min | Cubed: 12–15 min |
| Microwave | — | 5–6 minutes (flip at 3 min) |
| Stovetop | Boiling water | Cubes: 10–12 minutes boiling | Mashed: 15 min |
Oven: Pierce 5–6 times. Rub skin with oil and salt for crispy skin. Line baking sheet — sweet potato oozes sugar.
Air Fryer: Flip whole potato halfway. Cubed sweet potato in air fryer is excellent as a side or salad topping.
Microwave: Pierce 5–6 times. Done when completely soft throughout. Quick meal-prep option.
Stovetop: Cook until fork-tender. Drain and mash with butter, cinnamon.
Chef Tips
- 1Pierce before cooking — sweet potato can split or explode in both oven and microwave.
- 2Line your baking sheet — the natural sugars ooze out and caramelise (then burn and stick) on the pan.
- 3Sweet potato cubes: toss with olive oil, cumin, and paprika before roasting for an incredible side dish.
- 4They hold well once cooked — meal prep 4–5 sweet potatoes for the week.
Frequently Asked Questions
How long to bake a sweet potato at 400°F?
A medium sweet potato at 400°F takes 45–55 minutes. Large sweet potatoes may take up to 65 minutes. Pierce the skin, cook until a fork slides in with no resistance all the way to the centre.
How long to cook sweet potato in microwave?
Pierce 5–6 times, microwave on high for 5–6 minutes, flipping halfway. Done when completely soft. Rest 2 minutes — it continues cooking briefly. For 2 potatoes, add 3 minutes.
How long to roast sweet potato cubes?
¾-inch cubes at 425°F: 25–30 minutes, flipping halfway. For caramelised edges, don't overcrowd and don't stir too early — let the contact face get brown before moving.
Is sweet potato healthier than regular potato?
Different nutritional profiles: sweet potato has more vitamin A (beta-carotene), more vitamin C and antioxidants. White potato has slightly more potassium. Both are nutritious whole foods. Sweet potato has a lower glycaemic index making it better for blood sugar management.