They are selling “panini” (Thai name for these small beignets) at the Ratanakhorn market on Trepassit road every morning. I drive every day there and every day for more than one year I smell the horrible oil. I think that they never change it, they only add more when there is not enough.
One day I purchased, thinking that maybe they added soy sauce to it, but in fact the taste was more like if you are eating engine oil… how these people can be authorized to sell?
If you see people cooking in black stinky oil like this, do not buy!