Where can I find Spread sweet in Arth?

Spread sweet can also be found in these cities:

Baar Buchrain Buochs Cham Ebikon Einsiedeln Emmen Goldau Horw Ibach SZ Ingenbohl Kriens Küssnacht Lucerne Männedorf Richterswil Rotkreuz ZG Stans Steinhausen Stäfa Unterägeri Urswil Wädenswil Zug

You can also find this in Arth:

Milk Baking Ingredients Beer Jam Vinegar Beef Spices Cocoa Normal Rolls Acid Preserves