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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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!