demel k. & k. hofzuckerbäcker - it's right by the homburg, and the view from their terrace café is amazing. but the breakfast is, unfortunately, very average - and there are places where there's much better austrian food served. but their pastries and cakes are lovely, and the sweets make a good souvenir. you'll mainly bump into oversee tourists at demel.
Wiener Kaffeehaus Eiles –
140 Jahre Café Central: Als im Wiener Kaffeehaus Basketball gespielt wurde - Historisches Wien - derStandard.at › Panorama