27 Out-Of-This-World Space Cake Ideas That’ll Make Your Party Skyrocket

byAmber Pierce Updated on
cool space cake ideas

I could earn a tiny commission if you shop using my links. Read my disclaimer for more.

Do you have a little astronaut whose birthday is coming up? Or a unique space-related event to observe worthy of a party? Whatever it is, I’m over the moon excited to share these space cake ideas with you!

As someone who’s always got her head in the clouds (and loves stargazing!), I’ve rounded up 27 stellar designs that’ll transport your taste buds to another galaxy.

From swirling nebulas and familiar constellations to cute little aliens, these space cakes are gonna make your next celebration a real cosmic adventure!

1. Milky Way Magic Cake

A photo of a round cake with a dark blue base, swirled with purples, pinks, and whites to resemble the Milky Way galaxy. Edible glitter and silver stars are sprinkled across the surface. There are also edible planets placed on the cake, including a turquoise planet with a white stripe and a pink planet with a white heart. The cake is placed on a white stand and is surrounded by additional edible planets and stars.

Kicking off our space odyssey is this dreamy Milky Way cake.

The swirls of purple and pink against the deep blue backdrop are totally mesmerizing! I’d sprinkle some edible glitter and silver stars on top to really make it pop.

This cake is basically a portable planetarium you can eat!

2. Moon Landing Cake

A photo of a round cake decorated to look like the surface of the moon. The cake has a grey, textured fondant to simulate the moon's rough surface. There are craters on the cake. Atop the cake, there is a small astronaut figure and an American flag, recreating the iconic moon landing scene. The cake is placed on a stand.

One small step for man, one giant slice for cake lovers!

This moon landing cake is a real showstopper. The textured grey fondant looks just like the lunar surface, and those little craters? Spot on!

The mini astronaut and flag are the perfect finishing touches.

3. The Cutest Alien Cake Ever

cute space alien cake

Fair warning: Brace yourself for cuteness overload!

This cake has mini aliens and a shiny rocket ready to launch, with soft blues and twinkling stars creating a dreamy vibe. It’s like a space squad gathered for a little party on your table.

A great pick for little adventurers and anyone who’s curious about the cosmos, this cake is like a fun mini mission in dessert form. Those alien buddies are here to bring all the joy!

4. Constellation Cake

A photo of a dark blue round cake decorated with tiny white dots to resemble stars. Thin lines of royal icing connect some of the stars to form recognizable constellations like the Big Dipper and Orion's Belt. The cake is placed on a white plate. There is a sprinkle of edible glitter around the cake. The background is a beige wall.

Star-gazers, this one’s for you!

This constellation cake is like having the night sky right on your dessert table. The royal icing lines connecting the stars are so delicate and pretty.

You could have so much fun making different constellations! And if the person the cake is intended for is into astrology, you can add their zodiac sign on top.

5. Black Hole Cake

A photo of a round cake with a spiral design in various shades of blue and purple, leading to a dark center that represents a black hole. The edges of the cake are decorated with stars and swirling cosmic dust.

Talk about a gravity-defying dessert!

This black hole cake is mesmerizing with its spiraling design that pulls you right into the center. The cosmic dust and stars around the edges really make the whole thing pop.

Just be careful not to get sucked in while you’re eating it, hehe!

6. Black Galaxy Cake

cool black space cake with planets and stars

This cake brings the whole galaxy vibe straight to your table!

With golden planets and sparkly stars on a deep, spacey background, it feels like a slice of the universe right here on Earth. It’s a treat for any stargazer or space lover.

Great for celebrating with those who are into cosmic wonders, this cake adds a little magic and mystery. It’s like a starlit sky you can actually eat!

7. Friendly Alien Cake

fun space alien cake

This cake couldn’t be more fun! A cute little alien waves from the top, surrounded by planets and starry swirls. The vibrant colors pop against the galaxy background, giving the whole design a playful vibe.

Perfect for a kid’s birthday or any intergalactic-themed party, this cake brings joy and adventure. That little alien is ready to make everyone smile!

8. Astronaut Ice Cream Sandwich Cake

Remember those freeze-dried ice cream sandwiches we all wanted as kids?

Well, this cake brings that childhood dream to life – in giant form! The textured fondant exterior is spot-on, and I love the surprise chocolate layer inside.

It’s a nostalgic trip to space camp, but tastier!

If you don’t like pink, the outside can easily be any color – I bet black would look cool on that!

9. Nebula Cake

A photo of a round cake airbrushed with vibrant swirls of pink, purple, and blue to resemble a colorful nebula. The cake has a magical, shimmering effect due to the sprinkling of edible pearl dust over the surface. The background is a white table.

This nebula cake is like holding a piece of the cosmos in your hands.

The airbrushed swirls of color are absolutely breathtaking. And that pearl dust? It makes the whole cake shimmer like it’s alive with stardust.

I’m totally starry-eyed over this one!

10. Planet Party Cake

A photo of a tiered cake with each tier decorated as a different planet from our solar system. The bottom tier is Jupiter, followed by Saturn (complete with rings), then Earth, and topped with a small Mars-themed cake. The cake is placed on a round stand. There are planets and stars decorations around the cake.

This planetary parade cake is out of this world!

Each tier represents a different planet, with Jupiter’s swirling storms at the base and Saturn’s rings in the middle. The Earth tier looks so realistic, I’d almost feel bad cutting into it.

And that little Mars on top? Too cute!

11. Rocket Cake

A photo of a rocket-shaped cake with a pointed top. The cake is covered in white and red fondant. There are flames made of fondant at the base of the rocket. There's also a cloud of cotton candy smoke around the base of the rocket. The background is a wooden surface.

Blast off with this rocket cake! The sleek design and upright position make it look like it’s ready for takeoff.

Those fondant flames and cotton candy smoke at the base? Pure genius!

The smoke is totally optional, but if you choose to go with it, make sure to add cotton candy stuff right before serving so it doesn’t dissolve before it’s seen.

I’m sure this cake is gonna launch your party into the stratosphere!

12. Cosmic Cupcakes

A photo of a set of cupcakes with galaxy-themed swirling frosting in blues, purples, and pinks. Each cupcake is topped with a different space-themed fondant decoration, such as stars, planets, and UFOs. There is edible glitter on the frosting. The cupcakes are arranged on a plate. The background is a wooden surface.

Don’t have the energy or skill for a complicated cake? These cosmic cupcakes are a great alternative for those who want a bite-sized space adventure.

The swirling galaxy frosting is hypnotic, and I’m obsessed with the cute little space toppers!

You could spend hours just admiring all the different designs before devouring them! And unlike a single-themed cake, there is literally no limit to imagination here.

From colorful UFOs to stars and planets, feel free to exercize your cake decorating skills to the fullest!

13. Cute Green Alien Cake

cute friendly space alien cake

Here’s a cake that’s ready to blast all your guests off!

The friendly green alien with tiny horns and big eyes looks like he’s ready to greet party guests from another planet. The starry background and colorful planets make it feel like a fun space journey.

It’s playful, colorful, and adds an interstellar charm to any party. Just right for space enthusiasts or anyone who loves a cute alien twist!

14. Space Station Cake

A photo of a cake designed to look like the International Space Station. The cake has multiple cylindrical and rectangular sections connected together. Solar panels made of edible paper extend from the sides. There are also small, edible astronauts and a rocket ship on the cake. The background is a room with a table and chairs.

Houston, we have a delicious problem!

This International Space Station cake is a real engineering marvel. The attention to detail is incredible, from the different modules to those awesome edible solar panels.

It will take a lot of work and dedication to decorate like that, but it’s totally worth it if you want to leave all your guests mesmerized. They’ll be talking about it for years!

15. Martian Landscape Cake

A photo of a rectangular cake decorated to look like the surface of Mars. The cake has a reddish-orange fondant base textured to resemble the planet's rocky terrain. There are small fondant rocks scattered across the surface. At the center of the cake, there's a small Mars rover made of fondant. The Mars rover has two wheels and a cylindrical body. The rover is placed on a small square platform. The overall presentation is on a white cake stand.

Welcome to Mars, cake edition!

The reddish-orange fondant really captures that distinctive Martian look.

I’m in awe of the textured surface – it’s like you could reach out and touch those Martian rocks. And how cute is that little fondant rover?

It’s ready to explore… your taste buds!

16. Shooting Star Cake

A photo of a dark blue rectangular cake with a bright yellow fondant shooting star streaking across it. The star's tail is made of smaller stars and sparkles, giving the impression of movement.

Make a wish on this shooting star cake!

The contrast between the dark blue background and the bright yellow star is stunning. I absolutely adore how the tail of smaller stars gives it that sense of movement. It’s like capturing a magical moment in cake form!

This is a minimalist space cake for those who don’t have a lot of time or cake decorating skills but still want to impress with something special!

17. Birthday Cake For A Little Alien

tall space alien cake

This cake looks like a tiny alien village!

With a glowing door and moon windows, it feels like a little world of its own. The soft, sparkly green color and mini alien figures make it feel magical and inviting.

Great for a whimsical, space-themed celebration if you have a little one who’s into aliens and all that stuff. It’s like a little alien fairytale cake for anyone with bright imagination.

18. Solar System Swirl

A photo of a large round cake with a realistic portrayal of the solar system. The cake is decorated with concentric circles of different colors and sizes, each representing a planet orbiting the sun. The sun is at the center, with Mercury, Venus, Earth, and so on, arranged outwards in their correct order. The planets are made of fondant and are placed at precise intervals around the sun. The cake is topped with a small, white fondant sun.

This solar system cake is basically an edible astronomy model!

You can make it as accurate as you want, depending on your goals and the age of your audience. This one looks pretty cool, from the fiery center of the sun to the cool blues of the outer gas giants.

It’s educational and delicious – talk about a win-win!

19. Cosmic Cotton Candy Cake

A photo of a cake with pastel blue buttercream frosting. The cake is decorated with cotton candy tufts in pink and blue, arranged to look like cosmic clouds. Silver star sprinkles are scattered throughout the cotton candy. The cake is placed on a white stand. The background is simple and clean.

This cosmic cotton candy cloud cake is what sweet dreams are made of!

The combination of smooth buttercream and fluffy cotton candy is genius.

And those silver star sprinkles? They’re like little constellations hiding in the clouds. It’s a sugar rush waiting to happen!

20. Fun UFO Cake

A photo of a cake shaped like a classic 1950s-style flying saucer. The saucer is made of metallic silver icing and has a dome top made of blue-tinted sugar. There are small green alien figures peeking out from windows around the saucer's edge. The background is a vintage-style room with a checkered floor and a few objects.

I promised you aliens, didn’t I? This retro sci-fi UFO cake is giving me all the vintage alien vibes.

The metallic finish is so sleek, and that blue sugar dome? Out of this world!

I can’t get over those little green guys peeking out – they’re totally ready to party on Earth!

Definitely not a beginner-level space cake, so see for yourself if you’re up for a challenge.

21. Moon Craters Cake

This crater cake takes moon-inspired desserts to a whole new level!

Instead of just looking like the moon, it uses those iconic craters in the coolest way. Each one is filled with a different flavor – it’s like a delicious game of lunar roulette!

Who knew the moon could be so tasty?

22. Aurora Borealis Beauty

A photo of a rectangular cake with a black fondant base. The top of the cake is decorated with marbled streams of green, blue, and purple buttercream, mimicking the Northern Lights. Tiny white stars are piped onto the black areas.

This Aurora Borealis cake brings the magic of the Northern Lights right to your table. Here in Canada we are all for making our treats as beautiful as our skies.

The swirling colors against the dark backdrop are absolutely mesmerizing. Those tiny piped stars add the perfect finishing touch.

It’s like a slice of Arctic sky, minus the freezing temperatures!

23. Meteor Shower Madness

A photo of a tall, cylindrical cake covered in dark blue fondant. Streaks of white, yellow, and orange fondant crisscross the surface to represent meteors. Silver dragees are scattered across the cake to look like stars.

Duck and cover – it’s a meteor shower cake!

The streaking “meteors” against the night sky fondant are so dynamic, it’s like you can see them moving. And those silver dragee stars on blue surface? An easy and highly relevant backdrop for this celestial show.

This space cake is a showstopper that’s sure to spark conversation!

24. Comet Tail Cake

A photo of a tall, tapered cake resembling a comet. The top is a spherical cake covered in textured white fondant, while the rest of the cake cascades down in shades of blue and white, mimicking a comet's tail. The cake is placed on a silver stand. There is a sprinkling of edible glitter on the comet's tail. The background is clean and simple.

Talk about a cake with a tale to tell!

This comet cake is a real head-turner with its icy head and flowing tail. The gradual color change in the tail is so beautiful, it’s almost hypnotic.

Somewhat tough to make, probably even harder to cut into, but nobody will say they’ve seen anything like this before!

25. Satellite Dish Delight

A photo of a cake shaped like a satellite dish. The concave top of the cake is covered in metallic silver fondant. The base of the cake is decorated to look like electronic components, with small LED lights embedded to make it look operational.

Houston, we have contact – with this awesome satellite dish cake!

The metallic dish is so realistic, I’m half expecting it to start beaming signals. And those LED lights in the base? They take it to a whole new level of cool.

It’s the ultimate centerpiece for any space enthusiast’s party!

26. Space Shuttle Cake

A photo of a cake shaped like a space shuttle, complete with its distinctive white and black color scheme. The shuttle sits atop a cloud of "smoke" made from spun sugar, as if it's just launching. The cake is placed on a wooden board. There are rocket boosters beneath the shuttle. The background is a vintage setting.

3… 2… 1… Lift off! This space shuttle cake is ready for its tasty mission.

The detail in the shuttle design is spot-on, right down to the black and white color scheme. And that spun sugar smoke? It’s the perfect launchpad for this edible rocket.

It’s one small bite for you, one giant slice for cake-kind!

27. Zodiac Zone

A photo of a large, circular zodiac-themed cake. The cake is divided into 12 sections, each decorated with a different zodiac constellation. The cake is iced in a deep blue color. The constellations are piped in white royal icing and accented with edible gold stars. The cake is placed on a white stand.

What’s your sign? This zodiac cake has got them all!

Each slice is a different constellation, piped out in delicate royal icing. The gold star accents add just the right amount of sparkle.

It’s an obvious choice for an astrology-themed party, or for indecisive folks who want a little bit of everything!

Wrapping up

Wow, what a journey through the cosmos we’ve had!

From milky ways to moon landings, rockets to retro UFOs, these space cakes are truly out of this world.

I hope these ideas have inspired you to reach for the stars with your next baking project! As we all know, in the world of cake decorating, the sky’s not the limit – it’s just the beginning!

If you’re hungry for more celestial sweets, check out some of my other themed cake ideas! The cake universe is always expanding!

Amber Pierce

Amber Pierce is a content creator with a deep passion for cakes. She loves curating and sharing unique and mind-blowing cake design ideas that are sure to impress everyone regardless of the occasion! Her goal is to create an endless resource of awesome cake ideas that bring joy to every celebration.

Similar Posts