If you don't want to mess around with mirror glaze or you have a silicone mold with a nice structure you don't want to cover this might be an alternative for you. I have this beautiful mold from Silikomart which I want to use in different ways, so I prepared a Gelatine batter out of one package of Gelatine and 4 tablespoons of water. After the Gelatine has set for some minutes I heated it up in a pot till it's melted and brushed it into the mold. After the gelatin is dried slightly I filled in some cheesecake batter and froze the mold over night. If you want you can also insert some crunch, sponge cake or mini muffins.
After you demolded the cakes you can see the beautiful structure. You can also vary the results with different amount of gelatin.
Falls euch dieses Törtchen gefällt, schaut doch mal bei meiner Spiderweb-Mirror-Glaze vorbei.