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Check this out, it will be of interest to you, stores, recipes and places where you find the high quality tortillas

https://www.youtube.com/c/ArreMexicanEssen/about https://www.instagram.com/arre.mexicanessen/

Kellys expat in Amsterdam carries maseca harena, as well as various dried chilies, and imported tortillas: https://www.kellys-expat-shopping.nl/en/world-foods/mexican/

The Swedish site Andale.se has a selection of dry masa at all, which so far seems unusual.

Site is in Swedish though, and not sure if they ship outside of Sweden. Goodling around I found https://www.mexgrocer-eu.com/ which is in the Hauge.

Because I'm lazy I normally get the P.A.N. brand from the Albert Heijn, which is really meant for arepas but it does an ok job. If I fancy a short bike ride to De Pijp in Amsterdam, then Tjin's Toko sells the Maseca brand.

I once had guacamole in Helsinki. Never again.

Nothing you can buy pre-made is even close, that I have found anyway.

You can get masa harina at Albert Heijn (the bigger ones). But other than that: no.