1. Analysis of the reasons why purple potato tastes bitter and not sweet:

1. Not cleaned: If purple potato tastes bitter, it may be because the skin of purple potato is not cleaned, and there are impurities such as silt and even pesticide residues on the skin, which will make purple potato bitter. ?

2. Purple sweet potato has gone bad: Normal fresh purple sweet potato will not taste bitter. If it is still bitter after being cleaned, it means that purple sweet potato may have gone bad. Deteriorated purple potatoes like this are often accompanied by changes in taste and smell.

second, the method of selecting purple potato:

1. Look at the appearance: when buying purple potato, try to choose the purple potato with normal color, bar shape and no damage on the surface. Once the purple potato appears black and bug-eyed, it should be thrown away.

2. Smell: Purple potato has no special taste because of its high starch content, but fresh purple potato will be accompanied by a faint smell of earth, so we should choose this fragrant purple potato. Once purple smells musty, it means it is not very fresh. ?

3. Pinch texture: The texture of fresh purple potato is hard and heavy to weigh, but if the raw purple potato is soft to pinch, it means that the purple potato has gone bad.

Third, the method of steaming purple potato is sweeter:

1. Steaming without peeling: If you want purple potato to taste better, it is recommended not to steam without peeling, because the peel of purple potato can protect its pulp and reduce the loss of water and nutrients, so purple potato will taste more sweet.

2. Leave it for a few days before steaming: Or you can leave it for a few days before eating, and put it in a cool and dry place. When its water is slightly dried, its sugar will increase after its water is slightly evaporated. At this time, steaming purple potatoes will be sweeter.