The hottest trend this wedding season? Geode cakes, which look like they have the crystallized cross-section of gems baked right into them.

Large purple amethyst cake sparks wedding cake trend. Three different angles of Rachel Teufel's amethyst geode cake to show the depth of the design. Ali N Garrett Photography/Intricate Icings Cake ...

Halloween is a particularly busy season for Sideserf, as people seek spooky, unique cakes. She recommends trying her geode cake tutorial for those looking to make something eye-catching.

Minnesota bakery's unique cake goes viral after people mistake it for female body part The winner of Food Network's "Cupcake Wars" called it a geode cake.