How to Microwave Sweet Potatoes So They Stay Moist
If you microwave sweet potatoes as they are, the skin often turns hard and the inside becomes dry and crumbly. That happens because microwaves drive off moisture quickly. Wrap them in wet paper to trap moisture, then cook them “low and slow,” and you can get yellow, moist sweet potatoes without using an oven. The key is how you wrap them and how you divide the cooking time.
| Section | Key summary |
|---|---|
| Introduction | That happens because microwaves drive off moisture quickly |
| Why Sweet Potatoes Taste Sweet and the Best Cooking Temperature | Sweet potatoes become sweet when enzymes activated at 60~70 degrees convert starch into maltose |
| Timing by Power Level | Short key point |
Why Sweet Potatoes Taste Sweet and the Best Cooking Temperature
Sweet potatoes become sweet when enzymes activated at 60~70 degrees convert starch into maltose. If you cook them on high power all at once, they pass through this range too quickly, making them less sweet and drier. The trick is a two-step method: start on low power to give the enzymes time to work, then finish on high power.
Timing by Power Level
| Amount of sweet potato | Low power | High-power finish | Total time |
|---|---|---|---|
| 1 piece (about 200g) | 4 minutes | 1 minute | about 5 minutes |
| 2 pieces (about 400g) | 9 minutes | 2 minutes | about 11 minutes |
| 3 pieces (about 600g) | 13 minutes | 2 minutes | about 15 minutes |
- For more sweetness: refrigerate the cooked sweet potatoes for a day before eating to concentrate their sweetness.
- For a roasted flavor: after microwaving, cook them in an air fryer at 180 degrees for 5 minutes so the outside caramelizes slightly.
- To turn them into candied sweet potatoes, cut them into bite-size pieces and simmer them in sugar syrup.
Let leftover sweet potatoes cool slightly, wrap each one in plastic wrap, and refrigerate them for up to 3 days. If you mash them or freeze them whole, they will keep for up to a month. To reheat, wrap them again in a wet kitchen towel and microwave on low power for 1~2 minutes so they stay moist like the first time. Be careful when piercing them with a fork while hot, as steam can rush out and cause burns.