A rehrucken mold is a type of cake tin specifically used for making a German dessert called "rehrucken," which translates to "deer back." However, if you don't have access to a rehrucken mold, there are a few synonyms you can use instead. One option is a bundt pan, which has a similar shape with a central tube and fluted sides. Another possible mold is a Kugelhopf pan, which is also used for making cakes with a hole in the middle. A third alternative is a springform pan, which has removable sides and is often used for cheesecakes but can also work for rehrucken.