Where can I find Cornstarch in Laterns?

Cornstarch can also be found in these cities:

Altach Altstätten Andelsbuch Au Bizau Bludenz Brand bei Bludenz Buchs Damüls Diepoldsau Dornbirn Egg Feldkirch Göfis Götzis Heiden Hohenems Innerbraz Koblach Lustenau Mellau Mäder Nenzing Nüziders Oberriet Schlins Schnepfau Schnifis Schwarzenberg Silbertal Sulz Thüringen Vandans Weiler Widnau Übersaxen

You can also find this in Laterns:

Cheesecake Help Sunflower Seed Bread Diet Products Ready Meals Energy Drinks Baguette Roll Salt Sticks Pasta Pasta Sauces Waffles