I am ( was ) used to wandering over to Takashimayah in Tienmou once in a while for one of their peanut butter ( fish-shaped ) waffles… alas they are no more ! ( …used to be available in the basement ).
The stand always appeared to do really well… alas it seems to have gone the way of all those things you get hooked on in Taiwan.
BTW, they ( Takashimayah ) has a range of Thai cook-in sauces which may / may not be worth checking out… all instructions in English too ! ( I used to use those sauces a lot back in the UK… so much easier than finding all the original ingredients and a recipe )