Rice noodles are cooked in yellow and white.

1. If the homemade dried rice noodles are yellow, they are bad. This wet rice noodle is dark yellow after drying, which may be "aflatoxin".

2. There are three reasons for the yellowing of fried rice noodles: 1. The yellowing of fried rice noodles is related to the oil used. If rapeseed oil and soybean oil are used, the fried rice noodles will turn yellow; 2. Adding curry when frying rice noodles will also make rice noodles yellow. 3. If the rice noodles processed by yourself are yellow, think about whether they have not been washed, and you can add edible bleach appropriately. There are two reasons why rice noodles turn yellow when cooked: 1. Bleach may be added to the rice flour, and when the bleach fails after heating, the rice flour will show its original color; 2. It may be that the raw rice used for processing rice flour has mildew, and aflatoxin in rice flour will only change color if it exceeds the standard. To sum up, if the rice noodles suddenly turn yellow, for the sake of safety, it is best to throw them away and not eat them, which is likely to go bad and moldy.