How To: Easy Buttercream Geode Cake!

The geode cake trend has been super popular lately!  I’ve seen a lot made with fondant cakes, but today I’m showing you a really easy version, made with a buttercream frosted cake, and the new “Goldirocks” sprinkles collection from Fancy Sprinkles.  

Here's what you will need:

To start off, you’ll need a smooth frosted buttercream cake.  (I'll be sharing my favorite Swiss Meringue Buttercream Recipe soon!) You can choose any color frosting you want.  It’s best if your cake is cold, so keep it in the refrigerator for at least half an hour before starting.

Using a sharp knife, lightly trace the shape of the design you want. I usually like to make a diamond shape.  It does not have to be perfect!  Then carefully cut out that section of cake, making sure not to cut too deep in.  Start off with one section at a time to make it easier, and cut just a bit of cake.  You can always go back to cut more cake, so this way, you have more control over how the design looks like.

Once you have cut out your section and are happy with it, make sure the area is clean and free of any crumbs.  Then use a small angled spatula to spread buttercream over the section, making it as smooth as possible.  You don’t want too much, just enough to cover the cut section.  If you add too much buttercream, it will appear through the cracks of the rocks as you apply them on the cake.

To create the geode, I used the new “Goldirocks” collection from Fancy Sprinkles.  I love how there's different sized rocks and a wash of gold on each one. (Many of you already know my obsession with gold :D) All you have to do is carefully apply one goldirock at a time until you cover the entire surface.  You can either apply them randomly, or start at the edges first, or the middle going out.  Make sure you apply enough pressure so that they stay put onto the cake.  I like to put my cake on a turntable and give it a couple twirls to ensure everything is stable and no rocks fall out!

This is optional, but to add a little pizzazz, you can apply edible 24 K gold leaf to the edges.  If you want to do this step, you may want to stick your cake back in the fridge for another 20 minutes or so.  (Applying gold leaf on soft buttercream is a nightmare.)  

Another optional step is to add some more depth to the geode by applying some gold dust to the rocks in the center to make it a bit darker.

This is a simple yet beautiful option to the Geode design, but you are free to use any colored rocks, buttercream, and you even paint the edges with different colors (or use edible art paint!)  That's what I love about cakes - you can be creative and experiment until you find your own style :)

P.S. If you don't want to use the "Goldirocks", you can definitely try this with crushed rock candy!

Below is a Youtube video showing the process: