Poppy Seed Filling (Mohn) for Cakes, Pastries, Dumplings and Sweet Desserts. Ready to go filling from the finest squeezed Blue Poppy Seeds! No grinding, cooking or pouring. Dig out the old family recipes, wipe off the dust and get ready to do some serious baking. The flavor of Poppy Seed Cake can bring back the memories of Germany like no other taste.