Where can I find Toast bun in Oberönz?

Toast bun can also be found in these cities:

Balsthal Biberist Burgdorf Derendingen Egerkingen Gerlafingen Hasle bei Burgdorf Herzogenbuchsee Huttwil Kirchberg Langendorf Langenthal Murgenthal Münchenbuchsee Oensingen Oftringen Olten Rothrist Solothurn Utzenstorf Zell Zofingen Zuchwil

You can also find this in Oberönz:

Edible Curd Grated Lemon Peel Flaxseed Bread Fruit Bar Pickled Vegetables Fresh Salt Schupfnudeln Whole Grain Rolls Mayonnaise