A castle birthday cake is the crowning jewel of the dessert table. This version is so simple to make, but it has a big wow factor. If you can bake and ice a cake, you can make this castle cake.
For the castle shape, I used a square cake for the base. I baked and cooled two square cakes. Add a layer of frosting between the two cakes as you stack them.
For the top portion of my castle, I used a smaller round cake. Again I did two layers with buttercream frosting between the layers. You could do another square cake for the top layer if you prefer. I liked the contrast in shapes.
You’re not ready to ice the cakes in the desired color. My daughter’s party theme was Minnie Mouse so I used pink frosting with white and black accents. Choose whatever color fits the party theme. I iced both cakes smooth. You can use fondant to cover the cakes or make impressions in the frosting to look like bricks on a castle wall if you prefer texture.
Stacking the Cakes
With each individual cake iced, you’re ready to stack them. I like to put a few wooden dowels in the bottom cake to support the second layer. Cut the dowels so they are even with the top of the base layer. Press them down into the cake. Set your top layer gently onto the base.
Towers and Turrets
The towers are what really transform this cake into a castle. I used two flat-bottomed ice cream cones to make the four towers for the corners. Spread a thin layer of frosting on the bottoms of both of the cones. Press the two flat bottoms together. The open ends of the cones should be at the top and bottom of the tower. I frosted the cone tower in pink.
To make the pointed roof of the tower, you need a sugar cone that comes to a point. I covered my with fondant before attaching them to the towers. Put a small amount of frosting around the open end of the sugar cone. Turn it upside down and place it on top of the tower. I made icing stars at the base and top of the towers and in the middle where the two flat-bottomed cones met.
Position the towers at each of the four corners of the cake. I pressed mine as close as possible to the cake. You can fill in any gaps with more frosting if you want.
I also did three turrets on top of the round cake. For those I used one flat-bottom cone turned upright with a sugar cone upside down inside of it. It’s basically the top half of the corner towers. I cut two of the cones so the three towers in the middle were different heights.
Now that you have the basic shape of the castle cake, you can add the details you want. I used fondant to make the accents. It’s easy to work with and you can shape it any way you want. You can also roll it out and cut it into shapes.
I cut a castle door from black fondant to look like Minnie Mouse’s head. I made lines in the fondant to make it look like boards. I made a few smaller Minnie Mouse heads to put on the round layer. I also decorated both layers with white fondant dots.
I used a fondant bow to hide the seam between the square and round cake. I cut wide strips of white fondant and shaped them as a bow. I put wax paper inside the two loops to hold the shape while the fondant hardened. I cut another long strip of fondant and wrapped it around the base of the round cake. I then positioned the hardened bow along the strip.
The flag at the top was the final touch. I cut it front fondant and used a wooden skewer as the flag pole.
Castle Cake Finale
This cake truly is a basic design that anyone with cake decorating experience can tackle. Use the basic construction and add whatever details you want for your little prince or princess.