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    Decorated Treats » Recipes » Decorated Cakes

    Buttercream Castle Cake with Princess Toppers (How to Make)

    Published: Oct 4, 2020 · Modified: Sep 16, 2023 by Priya Maha

    Jump to Recipe

    This buttercream castle cake is the perfect show-stopping cake for any girl's birthday. Two-tiered in a lovely shade of pink, this castle themed cake is adorned with princess toppers and is sure to add a touch of fairytale charm to your birthday party or celebration.

    A two tier castle cake in pink, decorated with 6 Disney princess toy toppers.

    I made this buttercream castle cake with princess toppers for a little girl who was turning 6. In fact, this was the second castle cake I made for her. The first one was this castle birthday cake decorated with candies for her 3rd birthday. And if you like this cake, do check out this princess castle cake I made for a pair of twins for their 1st birthday.

    This buttercream castle cake is a 2 tier square cake measuring 5 inches and 8 inches in length. Each tier is approximately 4 inch high. The cake is carved to make the turrets and the stairs and is covered in buttercream. Fondant is used for the accents and the pretty princess cake toppers are all toy toppers.

    Note: This is an intermediate cake decorating tutorial and some basic knowledge about carving a cake and frosting a cake with buttercream is expected.

    Jump to:
    • ❤️Why You Will Love This Tutorial
    • 📋Supplies Required
    • 👩‍🍳How to Make
    • 💡Expert Tips
    • ❤️More Tutorials You Will Love
    • 📖Recipe

    ❤️Why You Will Love This Tutorial

    • You get to learn how to make a pretty castle cake for your little girl.
    • You can use the techniques shared in this tutorial for your other cake decorating projects.
    • The tutorial has a list of supplies and ingredients required to make this cake, making is super easy to recreate a similar cake.
    • Making your own custom shaped cake will save you a lot of money from having to order a custom made castle shaped cake.
    A two tier castle cake in pink, decorated with 6 Disney princess toy toppers.

    📋Supplies Required

    • Butter pound cake – Four layers of 8 inches square cakes (2 layers for the bottom tier, and two layers for the top tier (including the stairway) and the turrets).
    • Buttercream –To fill the cake layers as well as to level the sides of cake and crumb coat.
    • Fondant – I used Satin Ice fondant in white, chocolate and pink (for the cake borders, castle door, battlements (the top square borders of each tier) and the tiny 5 petal flowers on the cake). You can also make your own marshmallow fondant if you wish.
    • Food coloring in green, Americolor Electric Purple and pink.
    • Gum paste – I used Satin Ice gum paste for the lettering and number on the cake.
    • Plaque cutter – For the fondant plaque on the cake board.
    • Round cutter set – To cut the castle turrets.
    • FMM Block Letters Tappit cutters (alphabet cutter set) – For the lettering on the cake and the number 6 on the castle door.
    • Flower plunger cutter set – For all the tiny 5 petal flowers of the cake.
    • Square plunger cutter – For the top borders (battlements) of the castle.
    • Needle scriber tool – To mark the wood grain on the castle door.
    • Pizza cutter tool – To cut out the grass at the base of the castle.
    • Fondant extruder tool – For the border rope on the first and second-tier cake as well as the castle door.
    • Princess toy toppers
    A two tier castle cake in pink, decorated with 6 Disney princess toy toppers.

    👩‍🍳How to Make

    Step 1: Bake and Stack the Cakes

    Bake 4 layers of 8 inches square cakes measuring approximately 2 inches high each. Once the cakes are completely cooled down to room temperature. And then level the cake tops with a serrated knife or a cake leveler.

    Stack the first and second layer of the cakes together with some buttercream icing in between. This is for the bottom tier of the castle.  

    For the top tier, use the 3rd cake layer. Level the top and cut it into a 5 inch by 5 inch square and a 5 inch by 3 inch rectangle. Stack the smaller 5 inch by 3 inch rectangle onto the 5 inch square layer with some buttercream in between. Crumb coat the whole cake with a thin layer of frosting. Keep the remaining cake for the stairs.

    Stack the top tier of the cake onto the bottom tier with the support of bubble straws. In stacking the top tier, position it in the center of the cake (the top of the larger cake at the bottom tier) but towards the back edge of the cake. This is to give enough space to position the stairway for the castle at the front.

    Use the remaining cake from the 3rd layer to cut out the stairs and attach them to the stacked cakes with buttercream. Crumb coat the stairs.

    Princesses toy toppers on a pink cake.

    Step 2: Make the Castle Turrets

    For the castle turrets on the bottom tier, use the 4th cake layer. Cut out circles using the round cutter set. Choose a cutter with a diameter of approximately 2.5 inches and make sure that you are able to get 8 cut outs from the cake. You will need to stack 2 cutouts for each turret and there are 4 turrets in the castle.

    Stack the cutouts, 2 each with buttercream in between them to make the 4 turrets.

    Use the same cutter used to cut out the turrets to cut off a portion of each of the corners of the bottom tier to fit the turrets. And then use buttercream to attach the turrets to the corners of the castle cake. Crumb coat the turrets with a thin layer of buttercream and make sure the top and sides of the cake is level.

    Step 3: Cover the Castle Cake with Buttercream

    Divide your buttercream into 2. Tint the first portion with pink icing color and the second with Americolor Electric Purple. Cover the top tier with the pink frosting and the bottom tier with the purple frosting.

    Step 4: Make the Brick Patterns on the Cake

    Once the castle cake is completely covered in buttercream, use the needle scriber tool to mark the brick lines all around both tiers. Start by marking the horizontal lines. Use a ruler as a guide to make sure the lines are consistently sized. Once the horizontal lines are done, mark the vertical lines.

    Next, make the battlements. Roll a long strip of pink fondant. Cut into into a long rectangle piece of fondant strip measuring approximately 1 inch or 1 and half inch wide. Use the square plunger cutter to cut out alternate small squares on the strip. Attach these strips to the top edges of the castle cake and along the sides of the stairs. Repeat the process with purple fondant for the bottom tier.

    After that, cut out the tiny 5 petal flowers and attach them all around the battlement border.

    Step 5: Make the Castle Door

    Roll some chocolate fondant to about one eighth of an inch thick. Cut the door out of the fondant, free hand with the sugar craft knife or the pizza cutter.

    Use the needle scriber tool to mark the wood grain pattern on the door. Also mark a long line in the center of the door.

    Attach the door to the front of the castle. No glue is required as the buttercream is able to hold the door in place.

    For the door frame, pipe it out using the fondant extruder tool in brown fondant. Add 2 small pink flowers for the door knobs.

    Fondant plaque with happy birthday message on cake board.

    Step 6: Add the Grass Border

    To make the grass border at the bottom layer of the buttercream castle cake, tint some white fondant with green food coloring. Cut out a long piece of the green fondant strip and use the pizza cutter to cut the grass pattern. Attach to the cake.

    And then add the borders for both tiers.

    Step 7: Make the Cake Lettering

    Cut out a fondant plaque in chocolate fondant and attach the gum paste lettering to it using shortening. And then, attach the plaque onto the cake board, also with shortening.

    To make the gum paste lettering, roll the gum paste as thin as possible and let it rest for a few minutes (about 5 minutes) before cutting the alphabets for neater cut outs.

    And finally, arrange the princess toy toppers on the cake. And that completes the buttercream castle cake.

    A two tier castle cake in pink, decorated with 6 Disney princess toy toppers.
    Pocahontas toy topper.
    Disney princess toy topper.
    Princess toy topper.
    Princess Jasmine toy topper.

    💡Expert Tips

    • When making tiered cakes, use cakes that are sturdy like the pound cake. Instead of plain vanilla extract flavored pound cake, you can make chocolate cake, orange cake, marble cake or even coffee flavored cake.
    • Instead of baking the cakes in square pans, you can also make a round castle cake with cakes baked in round pans.
    • When attaching fondant cut outs (small and light fondant decorations) to buttercream cake, no special glue is required as the grease from the butter in the buttercream is able to hold these pieces in place.
    • For best results, FMM Tappit alphabet cutters require the fondant or gum paste used to be rolled paper tin. For this purpose, gum paste is a better option as it more flexible and is able to be rolled super thin without tearing unlike fondant. For best results also, let the gum paste dry slightly (for about 5 minutes) after rolling before cutting the alphabets for neater cut outs.
    • If you are transporting this buttercream castle cake to a different venue or location, only add the Princess cake toppers once you reach your venue. That will avoid the toppers from keep falling and ruining the decoration on the cake.

    ❤️More Tutorials You Will Love

    • A two layered butterfly pea cake frosted with white cream cheese frosting and decorated with blue fondant flowers and blueberries on a white cake stand, with a section cut out.
      Butterfly Pea Cake with Lemon Cream Cheese Frosting
    • A round rosette cake in white, pink, burgundy and green.
      Rosette Cake (Buttercream Cake Recipe)
    • A round black cake with Star Wars themed cake.
      Star Wars Birthday Cake (How to Make)
    • A round double barrel cake decorated with Simba cake topper, Lion King edible image and green fondant palm leaves.
      Lion King Cake with Simba Cake Topper

    Do you like this tutorial? Please leave a 5-star ⭐⭐⭐⭐⭐rating in the recipe card below and consider a review further down this page. I would love to hear from you. Thank you!

    📖Recipe

    A two tier castle cake in pink, decorated with 6 Disney princess toy toppers.

    Buttercream Castle Cake with Princess Toppers

    This buttercream castle cake is perfectly magical for any girl's birthday. Learn how to decorate the cake with this easy step by step guide.
    5 from 1 vote
    Print Pin Rate
    Course: Dessert
    Cuisine: American
    Prep Time: 30 minutes minutes
    Cook Time: 45 minutes minutes
    Decorating time: 2 hours hours 30 minutes minutes
    Total Time: 3 hours hours 45 minutes minutes
    Yield: 1 Two tier square cake
    Author: Priya Maha
    Prevent your screen from going dark

    Equipment

    • Plaque cutter
    • Round cutter set
    • Alphabet cutter set
    • Flower plunger cutter set
    • Square plunger cutter
    • Needle scriber tool
    • Pizza cutter tool
    • Fondant extruder tool
    • Princess toy toppers

    For best results, use the metrics measurements. US customary measurements have not been tested and are only meant for guide.

    Ingredients

    • 4 eight inch square cake layers (each measuring approximately 2 inches high)
    • Buttercream
    • Fondant
    • Gum paste

    Instructions

    Preparing and stacking the cakes

    • Bake 4 layers of 8 inches square cakes measuring approximately 2 inches high each. Once the cakes are completely cooled down to room temperature, level the tops.
    • Stack two of the layers together with some buttercream in between. This is for the bottom tier of the castle.
    • For the top tier, use the 3rd cake layer. Level the top and cut it into a 5 inch by 5 inch square and a 5 inch by 3 inch rectangle. Stack the smaller 5 inch by 3 inch rectangle onto the 5 inch square layer with some buttercream in between. Crumb coat the whole cake. Keep the remaining cake for the stairs.
    • Stack the top tier of the cake onto the bottom tier with the support of bubble straws. In stacking the top tier, position it in the center but towards the back edge of the cake. This is to give enough space to position the stairway for the castle at the front.
    • Use the remaining cake from the 3rd layer to cut out the stairs and attach them to the stacked cakes with buttercream. Crumb coat the stairs.

    Making the castle turrets

    • For the castle turrets on the bottom tier, use the 4th cake layer. Cut out circles using the round cutter set (choose a cutter with a diameter of approximately 2.5 inches and make sure that you are able to get 8 cut outs from the cake (You will need to stack 2 cutouts for each turret and there are 4 turrets in the castle).
    • Stack the cutouts, 2 each with buttercream in between.
    • Use the same cutter used to cut out the turrets, cut off a portion of each of the corners of the bottom tier to fit the turrets. And then use buttercream to attach the turrets to the corners of the castle cake. Crumb coat the turrets and make sure the top and sides of the cake is level.

    Covering the castle cake in buttercream

    • Divide your buttercream into 2. Tint the first portion with pink food coloring and the second with Americolor Electric Purple . Cover the top tier with the pink buttercream and the bottom tier with the purple buttercream.

    Making the bricks pattern on the cake

    • Once the castle cake is completely covered in buttercream, use the needle scriber tool to mark the brick lines all around both tiers. Start by marking the horizontal lines. Use a ruler as a guide to make sure the lines are consistently sized. Once the horizontal lines are done, mark the vertical lines.
    • Next, make the battlements. Roll a long strip of pink fondant. Cut into into a long rectangle strip measuring approximately 1 inch or 1 and half inch wide. Use the square plunger cutter to cut out alternate squares on the strip. Attach these strips to the top edges of the castle cake and along the sides of the stairs. Repeat the process with purple fondant for the bottom tier.
    • After that, cut out the tiny 5 petal flowers and attach them all around the battlement border.

    The castle door

    • Roll some chocolate fondant to about one eighth of an inch thick. Cut the door out of the fondant, free hand with the sugar craft knife or the pizza cutter.
    • Use the needle scriber tool to mark the wood grain pattern on the door. Also mark a long line in the center of the door.
    • Attach the door to the front of the castle. No glue is required as the buttercream is able to hold the door in place.
    • For the door frame, pipe it out using the fondant extruder tool in brown fondant.

    The grass border

    • To make the grass, cut out a long piece of green fondant strip and use the pizza cutter to cut the grass pattern. Attach to the cake.
    • And then add the borders for both tiers.

    The lettering on the cake

    • Cut out a fondant plaque in chocolate fondant and attach the gum paste lettering to it using shortening. And then, attach the plaque onto the cake board, also with shortening.
    • To make the gum paste lettering, roll the gum paste as thin as possible and let it rest for a few minutes (about 5 minutes) before cutting the alphabets for neater cut outs.
    • And finally, arrange the princess toy toppers on the cake. And that completes the buttercream castle cake.

    Notes

    • When attaching fondant cut outs (small and light decorations) to buttercream covered cake, no special glue is required as the grease from the butter in the buttercream is able to hold these pieces in place.
    • For best results, FMM Tappit alphabet cutters require the fondant or gum paste used to be rolled paper tin. For this purpose, gum paste is a better option as it more flexible and is able to be rolled super thin without tearing unlike fondant. For best results also, let the gum paste dry slightly (for about 5 minutes) after rolling before cutting the alphabets for neater cut outs.
    • If you are transporting this buttercream castle cake to a different venue or location, only add the Princess cake toppers once you reach your venue. That will avoid the toppers from keep falling and ruining the decoration on the cake.

    Nutrition

    Calories: 3480kcal | Carbohydrates: 732g | Protein: 64.8g | Fat: 32.4g | Saturated Fat: 9.6g | Polyunsaturated Fat: 5.4g | Monounsaturated Fat: 11.4g | Cholesterol: 1224mg | Sodium: 7476mg | Potassium: 1188mg | Fiber: 6g | Sugar: 440.4g | Vitamin A: 1848IU | Calcium: 840mg | Iron: 32.6mg
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    A two tier castle cake in pink, decorated with 6 Disney princess toy toppers.

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