Visit this lovely café and sweet shop with more than 200 years of tradition. The delicious sweets from here were also once served to the royalty so you definitely should not miss this place. Check the official website and the photos of the sweets, if you need any more convincing.
Wikipedia https://en.wikipedia.org/wiki/Demel
Official Website http://www.demel.at/
Facebook https://www.facebook.com/demelvienna
Email wien@demel.com
Phone +43 1 535 17 17-0
Address Kohlmarkt 14, Vienna 1010, Austria
Coordinates 48°12'30.978" N 16°22'1.959" E