Where can I find Sauce powder in Gappenach?

Sauce powder can also be found in these cities:

Andernach Boppard Cochem Kobern-Gondorf Koblenz Lahnstein Mülheim-Kärlich Münstermaifeld Neuwied Nickenich Plaidt Treis-Karden Waldesch Weißenthurm

You can also find this in Gappenach:

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