If you like smash style, Taihu in Da’an makes a good one. In general I find it pretty tough to get a good burger in Taipei, though. Oddly, I have better odds in Kaohsiung.
Big problem with that one for me is I’d need to ride another 50km or so to get home afterwards. I fear what was delicious going down would be considerably less appetizing on the way back up.
EDIT: just saw that you DID ride from the Danshui/ Zhuwei area, and back again. Wow! I’m amazed you could ride back after that sort of lunch!
“Smashed” flat onto a griddle kind of surface, often with onions in the patty, and greasy, as opposed to a big thick juicy grilled gourmet style patty. I’m a fan of both styles, but the latter is very difficult to find done properly in Taiwan (usually overcooked and dry). For the former, Taihu is great.
Hmmm, that cooking style would presumably maximize the surface crispness of the meat. Probably not the healthiest way to eat, but if done nicely it would almost certainly taste good!