Where can I find Baking soda in Schwarzhäusern?

Baking soda can also be found in these cities:

Balsthal Biberist Breitenbach Derendingen Egerkingen Egolzwil Erlinsbach Gerlafingen Herzogenbuchsee Huttwil Kirchberg Langendorf Langenthal Lostorf Murgenthal Oensingen Oftringen Olten Reiden Rothrist Schönenwerd Solothurn Utzenstorf Zell Zofingen Zuchwil

You can also find this in Schwarzhäusern:

Filter Coffee Baguette Roll Salt Sticks Pasta Pasta Sauces Waffles Soups Tea Loose Wine AA (Mignon) Batteries