If you’re planning a birthday party for a SpongeBob fan, then the cake has to be just as fun and colorful as Bikini Bottom itself!
A SpongeBob-themed cake can instantly light up the party with bright colors, playful designs, and everyone’s favorite characters like Patrick, Squidward, and even Gary the snail.
Whether you want a simple sheet cake with SpongeBob’s happy face, a 3D pineapple house cake, or a multi-tiered ocean adventure, there are endless ways to bring this theme to life.
Today, we’ve rounded up some of the most creative and exciting SpongeBob birthday cake ideas that kids (and even adults) will absolutely love.
1. The Big Grin Spongebob Character Cake
This Spongebob birthday cake idea features a cheerful yellow base. It showcases SpongeBob’s large, happy eyes and friendly smile. Arms extend from the sides, adding to the playful design.
The top bursts with an array of beloved characters. Patrick, Gary, and Squidward figurines are ready to celebrate. Seaweed decorations complete this fun underwater scene.
A “Happy Birthday” topper adds a festive touch. This vibrant cake is a delightful center piece for any celebration. It truly brings Bikini Bottom to life.
2. The Age Joke Spongebob Celebration Cake
This Spongebob birthday cake uses a vibrant blue frosting. It resembles the clear waters of Bikini Bottom. Colorful starfish and seaweed decorations adorn the sides.
The cake features a humorous quote, “You know what’s funnier than 24? 25.” This playful message adds a personalized touch for the birthday person.
Toppers of SpongeBob and Patrick laughing make this cake lively. They bring classic show humor to life. This cake is a fantastic choice for a milestone birthday.
3. Azear’s Spongebob and Friends Cake
This Spongebob birthday cake shines with a bright yellow base. It captures SpongeBob’s iconic, cheerful face perfectly. Playful arms extend from the sides, adding character.
Around the cake, various character cutouts add excitement. Patrick and Squidward stand by, joining the fun. Green accents resemble small kelp plants.
The top bursts with even more beloved figures. Gary, Sandy, and Mr. Krabs join a pineapple topper. A personalized “Azear’s” sign finishes this joyful design.
4. A Tall Spongebob Birthday Cake
This Spongebob birthday cake is a tall, impressive creation. The yellow frosting captures his porous texture with light and dark green dots. A brown and white shirt and tie are at the bottom.
His iconic big eyes and signature buck teeth are the main focus. The number ‘8’ rests on top, which is perfect for an eighth birthday celebration.
The name “Oskar” is written in brown letters at the bottom. The cake is simple yet so fun. This cake is an awesome treat for any young fan.
5. The Classic Happy Spongebob Square Cake
This themed dessert captures the character’s cheerful face and iconic square shape. The cake is covered in bright yellow frosting, with green circles to give it a porous look.
The bottom is detailed to look like his white shirt, brown pants, and red tie. The base of the cake stand is covered in crushed cookies, resembling sand with edible starfish and seashells.
It brings the Bikini Bottom theme to life for a fun and simple celebration. This creation is a fantastic and vibrant centerpiece for any birthday.
6. The Ombre Bikini Bottom Bash Cake
This adorable dessert features a gorgeous pink and purple ombre effect. Its wavy, layered frosting gives the cake a unique texture. A fun character cutout of Sandy Cheeks stands on the front.
A lively group of friends gathers on top, ready to celebrate. Cutouts of SpongeBob, Patrick, Gary, and Mr. Krabs add to the happy scene. White sprinkles mimic bubbles.
The base is decorated with crushed cookies to look like sand. There are also green seaweed cutouts and a personalized topper. It’s a sweet, fun design.
7. The Bikini Bottom Adventure Cake
This tiered cake captures an underwater adventure scene. On top, a cheerful SpongeBob and a pineapple house stand beside a large number three cutout.
The bottom layer shows a fun underwater world. Pink jellyfish seem to float on the blue icing. A smiling Patrick figurine is ready to join the fun.
Edible seaweed and sandy details complete the look. The name “MEMO” sits on the front. It is a fantastic cake for a third birthday celebration.
8. A Two Tiered Spongebob Adventure
This vibrant, two tiered cake stands out. The bottom tier features SpongeBob’s pineapple house, nestled amongst edible coral and seaweed. A “Happy 5th Birthday” sign adds a special touch.
The top tier is bright yellow, decorated with playful starfish and jellyfish. Small SpongeBob and Patrick figures are ready for fun. A number ‘5’ topper is perched on top.
This cake is a true underwater celebration. It is surrounded by colorful balloons, making it the star of any party. This design brings Bikini Bottom to life.
9. The Happy Spongebob Face Cake
This single-tiered cake is a cheerful SpongeBob face. The bright yellow frosting and big, happy smile make it a lively party centerpiece. It even has arms on the sides.
On top, his pineapple house is joined by his friends. Cutouts of Patrick, Mr. Krabs, and Gary complete the scene. A large number six adds a celebratory feel.
The name “Davi” personalizes this fun creation. This happy dessert is a great choice for any fan. It perfectly captures the character’s spirit.
10. The Ombre Undersea Celebration Cake
This beautiful dessert captures the fun of an undersea party. The cake features a stunning ombre effect, blending blue and pink frosting with a wavy, shimmering texture and a sandy top.
A happy Patrick cutout rests on the front of the cake. On top, a cheerful SpongeBob waves, holding onto a pink balloon. The characters look ready to celebrate.
The cake is adorned with playful coral and seaweed cutouts. A cluster of clear balloons on the side adds a whimsical, bubble like effect. This cake is truly a visual treat.
11. The Undersea Friends Celebration Cake
This round dessert is a slice of Bikini Bottom. The blue frosting mimics the ocean, decorated with wavy patterns. A shiny “Happy Birthday” topper announces the special occasion.
The cake is a fun gathering of friends. Figures of SpongeBob, Patrick, Mr. Krabs, and Squidward are all ready to celebrate. The scene looks lively and joyful.
A pineapple house cutout and various seashells create a detailed base. A number one candle stands proudly. This personalized cake for Iman Affan is a wonderful treat.
12. A Tall Undersea Friends Cake
This two tiered creation is a true undersea party tower. The bright yellow top layer features a large, happy SpongeBob face. The blue bottom layer resembles the ocean waves.
On top, his friends Patrick, Squidward, and Mr. Krabs are ready to celebrate. The bottom layer also features their iconic homes for extra flair.
A large number four and funny arms extend from the cake. A topper with the name “Juan Andrés” personalizes this cheerful treat. It’s a great cake for any fan.
13. A Simple Friends Celebration Cake
This clean, charming cake features a pale blue frosting base. Front and center, cutouts of SpongeBob and Patrick stand together. Their happy, friendly pose is the main focus.
Playful flower shapes are piped across the top and sides. The soft pink, yellow, and green colors add a gentle pop of color. The minimalist design is very appealing.
A “Happy Birthday” message is piped in white. This sweet and simple design shows that you don’t need many details for a truly memorable celebration.
14. A Two Tiered Undersea Adventure
This two tiered creation resembles the ocean floor. A happy SpongeBob figurine stands on the top tier, holding a sign with the number eleven. Sand covers the base of each layer.
Pink jellyfish seem to float across the bright blue frosting. The sides of the cake are adorned with realistic coral and seashells. This brings the undersea world to life.
The bottom tier has a pink starfish and more shell details. This cake is a fantastic centerpiece. It looks both delicious and visually stunning for a celebration.
15. The Happy Undersea Ombre Cake
This round dessert features a gorgeous blue ombre frosting. It fades from a dark ocean blue to a bright light blue. Piped bubbles and a sweet jellyfish decorate the sides.
On top, a happy Spongebob figurine is sitting proudly. A shiny number eight stands next to him. Clear, bubble like lollipops add a playful, whimsical touch to the design.
The cake is personalized with a name on the top. This charming and well detailed creation captures the spirit of the show perfectly. It is a true visual delight.
16. A Bikini Bottom Party for Khalil
This undersea themed dessert features a realistic sandy top. Cheerful figurines of SpongeBob and Patrick are ready to celebrate. A sign says “Khalil 5th Birthday” for a personal touch.
The sides of the cake show off a fun scene. A pineapple house is a main feature, surrounded by playful jellyfish and starfish. Coral and shells complete the look.
This cake is an adventure in every slice. It is a fantastic centerpiece. The design is both visually appealing and perfectly themed for a special occasion.
17. The Two Tiered João Cake
This two tiered creation is a true undersea party tower. The light blue bottom layer features a large number five. A bright yellow top tier completes the design.
On top, cutouts of SpongeBob, Patrick, and Squidward are ready to celebrate. They are joined by Mr. Krabs and Gary on the bottom. Bubbles float around them.
The name “João” is written on a topper above everyone. This personalized cake is a vibrant and fun treat. It is a great choice for a fifth birthday.
18. A Humorous Birthday Cake
This small, round dessert features a soft purple frosting. A playful border of piped icing and sprinkles adorns the top edge. It is decorated with starfish and jellyfish.
The top is adorned with a shiny number 25. Next to the number are smiling cutouts of SpongeBob and Patrick. They add a fun, humorous touch to the design.
This cake proves that good things come in small packages. It’s a very cute and simple celebration. This dessert would be a great surprise for a friend’s special day.
19. The Big Grin and Friends Cake
This round dessert is a slice of pure joy. The yellow frosting is bumpy to look like a real sponge. A big, happy SpongeBob face is on the front.
A small group of character figurines stands on top, including Patrick, Gary, and Squidward. They are all ready to celebrate. A “Happy Birthday” topper adds a festive flair.
The cutout arms on the sides make the cake feel extra playful. This fun and simple creation is a great idea. It proves you do not need a big cake for a great party.
20. The Bikini Bottom Adventure Cake
This tiered cake captures an underwater adventure scene. On top, a cheerful SpongeBob and a pineapple house stand beside a large number three cutout.
The bottom layer shows a fun underwater world. Pink jellyfish seem to float on the blue icing. A smiling Patrick figurine is ready to join the fun.
Edible seaweed and sandy details complete the look. The name “MEMO” sits on the front. It is a fantastic cake for a third birthday celebration.
