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Finished round SpongeBob cake on a decorated birthday table.

Round SpongeBob Cake

A creative round SpongeBob cake tutorial perfect for birthday celebrations with a playful design.
Print Recipe Pin Recipe
Prep Time 1 hour
Cook Time 35 minutes
Chilling Time 30 minutes
Total Time 2 hours 5 minutes
Course Dessert
Cuisine American
Servings 12 people
Calories 350 kcal

Equipment

  • 2 8-inch round cake pans Greased & lined with parchment paper
  • 1 Mixer Stand or handheld for batter & frosting
  • 3 mixing bowls For cake batter, frosting, and fondant
  • 1 Offset Spatula For smooth frosting application
  • 1 Cake turntable Recommended for easier decorating
  • 1 Leveler or serrated knife For leveling cake layers
  • 1 Piping bag set For decorative piping
  • 1 Fondant toolkit Rolling pin, cutters, smoother if using fondant

Ingredients
  

Cake Batter:

  • 1 box Yellow/Vanilla Cake Mix For two 8-inch layers
  • 3 Eggs As per box instructions
  • Ingredients for water oil, etc. (According to box instructions)

Buttercream Frosting:

  • 2 cups Unsalted Butter Softened
  • 6 cups Powdered Sugar Sifted
  • 2 tsp Vanilla Extract Pure
  • 3 tbsp Milk Whole or as needed
  • Food Coloring Yellow, Black, Blue, Red, Pink as required

Optional Fondant Elements:

  • 1 lb Fondant Various colors for advanced decoration
  • Gel Food Coloring As needed for tinting

Instructions
 

  • Preheat oven to 350°F and prepare two 8-inch cake pans by greasing and lining with parchment paper.
    1 box Yellow/Vanilla Cake Mix, 3 Eggs, Ingredients for water
  • Mix cake batter according to instructions, divide evenly between pans, and bake for 30-40 minutes until a toothpick comes out clean.
    1 box Yellow/Vanilla Cake Mix, 3 Eggs, Ingredients for water
    Baker pouring cake batter into two greased 8-inch pans.
  • Cool cakes for 10-15 minutes in pans, then invert onto a wire rack and level tops using a serrated knife.
    Mixer bowl with soft butter and powdered sugar being whipped.
  • Prepare buttercream frosting by beating 2 cups softened butter, gradually adding 6 cups powdered sugar, then mixing in 2 tsp vanilla extract and 3 tbsp milk until light and fluffy.
    2 cups Unsalted Butter, 6 cups Powdered Sugar, 2 tsp Vanilla Extract, 3 tbsp Milk, Food Coloring
    A cake turntable with two leveled cake layers and a smooth crumb coat.
  • Assemble the cake by placing one level cake layer on a board, spreading a cup of buttercream, stacking the second layer, and applying a crumb coat. Chill for 30 minutes.
    A baker piping detailed SpongeBob facial features on a round cake.
  • Decorate the cake by piping SpongeBob’s facial features with colored buttercream. Optionally, add fondant details for a more polished look.
    Gel Food Coloring, 1 lb Fondant
    Finished round SpongeBob cake on a decorated birthday table.

Notes

  • Ensure cakes are completely cooled before frosting to prevent melting.
  • Use a cake turntable for smoother decorating.
  • Adjust food coloring amounts for the perfect SpongeBob yellow.
  • Fondant decorations can be prepared 1-2 days in advance.
Keyword birthday cake, cake decorating, round cake, SpongeBob cake, SpongeBob SquarePants