Where can I find Poppy seed roll in Zwingen?

Poppy seed roll can also be found in these cities:

Aesch Allschwil Arlesheim Balsthal Basel Binningen Birsfelden Breitenbach Bubendorf Delémont Dornach Ettingen Füllinsdorf Grenzach-Wyhlen Kanton Reinach Laufen Liestal Lörrach Moutier Muttenz Münchenstein Oensingen Pratteln Rheinfelden (Baden) Riehen Weil am Rhein

You can also find this in Zwingen:

Acid Preserves Vegetable Oil Prosecco Aquavit Confectionery Potato Specialties Salami And Permanent Sausage Milk Baking Ingredients Beer