How to Make A Purple Geode Cake

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I finally hoped on the geode cake band wagon this weekend, and found that it is WAY easier to make a geode cake than I thought! All you need is a frosted cake, some white/clear rock candy, gel food coloring, and a little vodka!

I was inspired by an amazing geode wedding cake made by Intricate Icings Cake Design, and also added a gold boarder with edible gold paint. I modified the design to make it a bit more approachable for all of us home bakers!

I used my favorite vanilla layer cake recipe (bakes perfectly flat), which I colored purple with gel food coloring. I baked 4, 8-inch round cake layers, and frosted the layers with american buttercream (I used 1.5 batches). Once stacked, I applied a thin crumb coat around the cake, and trimmed a triangle from one side of the cake.

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I then covered the exposed area with frosting, and let the cake chill in the freezer for about 5 minutes, until the crumb coat is firm to the touch. Apply a second layer of frosting, and smooth using a bench scrapper. Gently press crushed rock candy into the cut area of the cake. I started with the larger chunks of candy, then filled in with smaller bits of candy.

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Mix together a few drops of vodka and large squeeze of purple gel food coloring. Using a sterile paint brush, gently dab the mixture into the center of the candy area.

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Rinse off and dry your paint brush, and add some additional vodka into the gel food coloring to dilute the mixture. Brush around the dark purple center, gradually spreading the lighter purple liquid out towards the edge of the candy covered area. Leave the rock candy around the edge uncolored. I also painted the edge of the candy area with a boarder of edible gold paint.

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And that’s it! It’s that easy!!! If would also be fun to use a grey buttercream (or even an oreo buttercream), to make the cake look more like a rock.

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