Where can I find Three-grain bread in Mauensee?

Three-grain bread can also be found in these cities:

Egolzwil Emmen Fahrwangen Hitzkirch Horw Huttwil Kriens Lucerne Malters Menziken Murgenthal Oberkirch Oftringen Olten Rain Reiden Reinach Rothrist Ruswil Schöftland Sempach Sursee Urswil Wolhusen Zell Zofingen

You can also find this in Mauensee:

Mustard Bourbon Whiskey Candies Fruit And Vegetables Sausage Packed Rice Pudding Baking Powder Spelt Bread Nut Nougat Cream Balsamic Vinegar