Where can I find Sauce powder in Hintermoos?

Sauce powder can also be found in these cities:

Aarau Buchs Egerkingen Egolzwil Erlinsbach Fahrwangen Gränichen Hitzkirch Huttwil Langenthal Lenzburg Lostorf Lupfig Mellingen Menziken Murgenthal Möriken-Wildegg Oberkirch Oftringen Olten Rain Reiden Reinach Rothrist Schöftland Schönenwerd Sempach Seon Suhr Sursee Unterentfelden Zell Zofingen

You can also find this in Hintermoos:

Wheat Toast Lump Sugar Fish Sticks Roll Cheesecake Help Sunflower Seed Bread Power Bar Salads Iced Tea Coffee