Geode Cake

It takes thousands of years for geodes to form naturally inside hollow rocks, but you can recreate one on your next cake design with this simple and straightforward method in less than an hour! Join cake designer Rachael Teufel as she shares her viral geode cake design with you in this free lesson.

Starting with a fully iced cake that is paneled in modeling chocolate, Rachael carves out an irregular triangular piece of cake and covers it with a thin layer of modeling chocolate for the base. Then Rachael gets to layering three different types and sizes of sugar crystals to mimic the natural rock formations as they break open and show off all of those beautiful crystals. Tiny crystals are attached on the outer edges, then sanding sugar and larger rock candy sugar in the deep cavernous portion.

After adhering, Rachael shares her tips on coloring the crystals to achieve a natural variation of color without dissolving the sugar. Rachael chooses to create a deep purple amethyst, but her method can easily be adjusted to mimic any color of geode. In the last step, Rachael demonstrates two ways to finish out the exterior edge of the geode to recreate the natural striation with an edible marker or paint with a veining tool and/or paintbrush. Rachael suggests using gold or silver leaf here as well.

Also included are tips on how to create this versatile deign in fondant or buttercream, avoiding bare spots, and adhering crystals onto crystals. To take your geode cakes to the next level, check out Rachael’s premium video “Naturally Elegant Cake Design” for more in-depth instruction.