Jörg, the creator of this cocktail, says, "Better too much than not enough basil in this drink". He also specifies that the basil is muddled rather than...
I did try it with Stockholm’s Bränneri Akvavit (I have no Danish Akvavit) instead of the Gin and it was even better than with the Gin. The Celery, Basil, and Aquavit work well together. I would have thought northern Germany (Hamburg) would have tried this already.