Where can I find Baking powder in Koppigen?

Baking powder can also be found in these cities:

Bern Biberist Bremgarten bei Bern Burgdorf Derendingen Gerlafingen Grenchen Hasle bei Burgdorf Herzogenbuchsee Hinterkappelen Huttwil Ittigen Kirchberg Langendorf Langenthal Moutier Murgenthal Münchenbuchsee Oensingen Ostermundigen Solothurn Utzenstorf Zollikofen Zuchwil

You can also find this in Koppigen:

Pudding Decorative Sugar Three-Grain Bread Cereals Delicatessen Sausage Spice Pastes Mashed Potatoes Raisin Roll Canned Sausage