Mix the marzipan and butter well (works best with a food processor). Add powdered sugar, vanilla sugar, egg and flavor. Mix the flour and cornstarch, work in gradually.
Pour the smooth dough into the pastry press and place the flowers on the well-greased tray (no baking paper). Use the handle of a wooden spoon to make small indentations in the center. Mix cherry jam well with 1 level teaspoon starch. Use the jam syringe to squirt the cherry jam into the wells of the biscuits.
Bake at 175 ° C (gas stove, electric stove for a bit longer) for 8-10 minutes on the top shelf until golden.