I hope you have a great trip! If you find yourself with a window of free time, there is a bakery called Pastisseria Hofmann that makes a sweet cream filled croissant that is dangerously good. We got one in ~2018 and have wanted another one since haha
Spent two months in Barcelona over the last year, and I second the recommendation. The mascarpone croissant is excellent, but I would actually recommend the raspberry jam croissant even more highly. I haven’t had a thing from Pastisseria Hofmann that I didn’t like.
