How long it takes to cook a sweet potato usually depends on its size. If the sweet potato is not very big, it usually takes about 10- 15 minutes; if it is big, it usually takes about 15-20 minutes or even half an hour.

If it is time to judge whether the sweet potato is ripe, you can poke it with chopsticks. If you can poke it, it means that the sweet potato is ripe and can be fished out.

Whether sweet potato is cooked or steamed is delicious, depending on personal preference.

Sweet potato is a kind of tuber food, which contains a lot of starch and sugar. If steamed directly, it can keep its original flavor and taste sweeter, while if boiled, it will be softer and more moist. Everyone has his own preferences for food. You can choose a cooking method according to your own preferences.

Sweet potatoes can be stored for several days after being cooked, depending on the situation.

Sweet potato is rich in nutrition and easy to deteriorate after cooking, but its deterioration time will be different according to different storage environments and methods. For example, if it is stored at room temperature in high temperature environment in summer, it may deteriorate only 1 day.

However, if it is stored in the low temperature environment in winter or directly in the refrigerator, it can generally be stored for about 3-4 days. Because the bacteria and microorganisms that can cause food deterioration will be inhibited in the low temperature environment, the food storage time is usually long, so it is recommended that the sweet potato be cooked and stored in the refrigerator.

Can sweet potatoes turn black after being cooked? It depends.

If the sweet potato is only black, but the meat quality, smell and taste are normal, it is likely to be caused by oxidation or burning, which has no impact on health and can continue to be eaten.

However, in addition to blackening, there are cases of rot, mildew and bad taste, indicating that sweet potatoes have deteriorated and can no longer be eaten, so as not to cause nausea, vomiting, abdominal pain, diarrhea and other physical discomfort.