You're probably going - luxem what?? :)
I discovered these lovelies on my trip to Switzerland last December. I first saw them in Zurich, and despite being a big fan of anything vaguely meringue-ish, I was unwilling to buy them - they were not cheap! But I finally caved while I was in Lucerne and ate them while walking to the Dying Lion of Lucerne monument.
I went from one extreme to another - from not wanting to buy any to getting two of each flavour they had in the shop :D And they were as heavenly as I imagined...
Didn't take very long to finish them all despite me taking every effort to make the experience last as long as possible :) Unfortunately they don't travel well so I couldn't get hold of any - till now. Thanks so much, Stefan!
What exactly are luxemburgerli? Wikipedia describes it as something "similar to a small French macaron", meringue-like cookies. But the Luxemburgerli is very cutely bite-sized and is much lighter than a macaroon. You can only get them from Confiserie Sprüngli in Switzerland.
If you ever go to Switzerland, this is a definite must try (the other must try is Teuscher Champagne Truffles).