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Yummy Galaxy chocolate cupcakes with a chocolate cupcake sponge, Galaxy chocolate buttercream frosting. GALAXY HEAVEN!

Galaxy chocolate cupcakes

Galaxy = yum. Chocolate = yum. Cupcakes = yum. Galaxy chocolate cupcakes?! Oh holy moly yum! I just can’t really cope with how good they are. Like, I am so proud of the photos of these cupcakes, because I think it shows how good these cupcakes are.

I thought these cupcakes deserved a good start, and that paragraph I think sums them up nicely. I am obsessed with them. They’re delicious, so chocolatey and heavenly. How many times can I say that before it gets boring?! Honestly? 


Anyway… the cupcakes. I decided to use my standard brown sugar chocolate cupcake sponge. It’s an easy basic sponge, plus cocoa powder. They’re still light and delicious, and I use them in so many recipes – including my Toblerone cupcakes!

If you wanted a richer and more indulgent cupcake mix however – I one hundred percent recommend using my chocolate fudge cupcake recipe. They’re gooey, so fudgey, and purely epic. However, I understand that not everyone wants to go through that faff of the recipe, so I went for a basic on for these bad boys!

Baking cups

As usual I used my all time favourite baking cups from Iced Jems. The good thing about them is that they’re so easy to use, and she sells so many of them there is always ones to suit your theme! I used the brown polka dot baking cups as the brown colour fit the chocolate theme! 


Like me, you can put some chopped galaxy throughout the cupcake – but its completely optional. You have enough galaxy in the buttercream and decoration that you definitely don’t need it – but I just love going a little overboard on a flavour theme! As you all well know… 

As you can get the darker galaxy collection now, I used half of that and half of the regular galaxy in the buttercream frosting, but either work perfectly. It’s why the buttercream frosting is slightly darker – but don’t worry.. it tastes perfectly like Galaxy still!


I used my favourite 2D closed star piping tip for the frosting – as I am just obsessed with the swirl it creates. a 1M open star piping tip also works really well though. I always use ‘medium’ size piping tips in general, apart from a couple which are large. 

I sometimes get comments saying how are my swirls so good, when others come out looking a bit like spaghetti, and that’s because a lot of piping tips that are sold in places such as supermarkets are much much smaller than the ones I use. 


For the decoration I use a couple of chunks of galaxy chocolate, a galaxy counter, and my favourite bronze crunch sprinkles. I was going to do a drizzle of galaxy chocolate… but I might have eaten the spare required for that job. My bad. 


Galaxy Chocolate Cupcakes!

Yummy Galaxy chocolate cupcakes with a chocolate cupcake sponge, Galaxy chocolate buttercream frosting. GALAXY HEAVEN!
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Category: Cupcakes
Type: Cupcakes
Keyword: Chocolate, Galaxy
Prep Time: 20 minutes
Cook Time: 20 minutes
Decorating Time: 20 minutes
Total Time: 1 hour
Servings: 12 Cupcakes
Author: Jane's Patisserie



  • 150 g Unsalted Butter/Stork
  • 150 g Light Brown Sugar
  • 120 g Self Raising Flour
  • 30 g Cocoa Powder
  • 3 Medium Eggs
  • 100 g Galaxy Chocolate (chopped)


  • 150 g Unsalted Butter (not stork)
  • 300 g Icing Sugar
  • 175 g Galaxy Chocolate (melted)


  • Galaxy Chocolate
  • Galaxy Counters
  • Sprinkles


For the Cupcakes

  • Preheat your oven to 180C/160C Fan, and get your 12 cupcake cases ready.
  • Beat together your butter and sugar, until light and fluffy.
  • Add in the flour, cocoa powder and eggs and beat until a lovely cake mix is formed!
  • Fold through the chopped galaxy chocolate!
  • Split evenly between the 12 cases, and bake in the oven for 17-20 minutes. I bake mine for 18 minutes!
  • Once baked, leave to cool fully.

For the Buttercream

  • Make sure your unsalted butter (not stork) is at room temp.
  • Beat your butter until smooth.
  • Add in the icing sugar and beat again!
  • Add in your melted galaxy chocolate and beat till a lovely buttercream is made. If it's a little stiff, add in 1-2tbsp of boiling water. Only do this is essential!

For the Decoration

  • Pipe your buttercream onto the cupcakes with your favourite piping tip - I use a 2D closed star piping tip.
  • Add on some galaxy chocolate - I did two chunks of galaxy chocolate and a galaxy counter per cake, and then sprinkled on my favourite sprinkles.
  • ENJOY!



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© Jane’s Patisserie. All images & content are copyright protected. Do not use my images without prior permission. If you want to republish this recipe, please re-write the recipe in your own words and credit me, or link back to this post for the recipe.


  1. Emily on May 21, 2024 at 11:48 pm

    Hi Jane! I was wondering if you can making this recipie using galaxy caramel chocolate? If so would you recommend using it in both the cupcake batter and the frostings or just inside the batter? And would you use the same amount? Thank you!

  2. Kel on May 29, 2022 at 5:27 pm

    Hi, I’ve been asked to make a galaxy choc birthday cake next week and love your recipes. I can only find the cupcake recipe. Could I adapt this to make one big cake?

  3. Lauren on May 7, 2022 at 6:35 pm

    How do I make this recipe into a cake? I want to make it as a birthday cake thanks xx

  4. Zara on May 6, 2022 at 5:09 pm

    Hi Jane if I’m making it with my 4 year old sister ,can I add food die and if I do how much would I us in the buttercream?
    Thank you very much 🤗🤗

    • Jane's Patisserie on May 17, 2022 at 1:17 pm

      Hiya! You can give it a go – however it may be slightly tricky as the buttercream is chocolate so you won’t be starting from a white base! Hope this helps! x

  5. Amber on May 5, 2022 at 12:24 pm

    Hi I made this recipe and My icing was a lot paler than yours, why would this be? I followed the recipe exactly xx

    • Jane's Patisserie on May 17, 2022 at 1:12 pm

      Hiya! In the blog post, I note the I used part regular and part dark Galaxy, so that would be why! Hope this helps! x

  6. Rosie on September 9, 2021 at 3:28 pm

    Hello! Love all your recipes. I am looking at making these but instead miniature cupcakes (like canope/bite size).
    How many mini cupcakes do you think this recipe would make and how long would they need to be in the oven?
    Thank you!

    • Sam on September 26, 2021 at 12:36 pm

      How long should I wait to add the melted chocolate to the buttercream? So excited to make these!

    • Katie on March 1, 2022 at 8:55 am

      Hi Jane,
      I love this recipe so much, I’m looking to use it to make an 8 inch cake, how many times would you say I should increase the recipe by? Thanks

    • Jane's Patisserie on March 6, 2022 at 4:59 pm

      Usually one batch of cupcakes = 1 8″ cake baked for 30 minutes! Or, use ratios from my layer cake recipes! x

  7. Debbie on July 5, 2021 at 9:49 am

    can i make these galaxy cupcakes into gluton free

  8. Claire on June 11, 2021 at 6:40 am

    Hi Jane
    With the stork butter for the cupcakes do you leave it at room temperature or can you use it out of fridge?
    Thanks Claire

    • Jane's Patisserie on June 14, 2021 at 11:08 am

      Hey, for the sponge it can be out of the fridge x

  9. Rosie on June 4, 2021 at 7:00 am

    Hello Jane! Would you be able to use another chocolate like dairy milk or lindt for the sponge? Thank you and have a nice day 🤍

    • Jane's Patisserie on June 4, 2021 at 9:31 am

      Hey! Yes most should work, thank youuu and you xx

  10. Claire on June 2, 2021 at 7:39 am

    5 stars
    Hi Jane,
    Love these cup cake but do u use a beater attachment or wisk attachment to make cake mix. Thanks Claire

    • Jane's Patisserie on June 2, 2021 at 9:44 am

      I always use a beater to make cupcake batter and buttercream, never the whisk x

  11. Kerryann on April 13, 2021 at 12:04 am

    I was scrolling this afternoon looking for a quick cupcake recipe to make with my children and came across these beauties!! Really easy to make and taste super delicious and I haven’t put the topping on yet!

    • Jane's Patisserie on April 13, 2021 at 12:27 pm

      Hey! Yayy I am so pleased you all enjoyed them xx

  12. Karen Cullen on March 22, 2021 at 1:02 pm

    Hi Jane, what cocoa powder do you recommend for your chocolate cakes? I wouldn’t want the rich creaminess of the galaxy chocolate to be taken away with an over powering bitter cocoa powder.

    • Jane's Patisserie on March 22, 2021 at 3:50 pm

      I use Barry cacao 100% – but I find it is delicious so doesn’t over power x

  13. Gemma Quinn on March 3, 2021 at 5:38 pm

    5 stars
    Hi Jane, I made these for a friend and they went down really well. My question is how do I adapt the recipe for a 10″ square cake tin? Would I be able to adapt the galaxy buttercream to a fudge cake frosting?

    • Jane's Patisserie on March 3, 2021 at 8:10 pm

      Hiya! So I normally say one batch of cupcakes makes 1x 8″ round cake – so a 10″ square I would actually double the recipe (not sure on bake time though but maybe like an hour at 150fan? x

  14. Grace Macdonald-cain on February 28, 2021 at 8:05 pm

    Hi I’ve made these before and making these again now. But I don’t have any galaxy chocolate for the buttercream could I make this with normal milk chocolate? Hopefully you will seen this soon. Many thanks.

    • Jane's Patisserie on February 28, 2021 at 10:06 pm

      Yes you can! X

    • Lauren on March 30, 2022 at 1:34 pm

      How cool does the melted chocolate need to be before adding it to the buttercream?

    • Jane's Patisserie on March 30, 2022 at 3:50 pm

      Hiya! Your chocolate should be at room temp before adding it to the buttercream. Hope this helps! x

  15. Gillian Downey on February 2, 2021 at 5:28 pm

    5 stars
    Ive these for my kids a few times now and they love them….can i make them gluten free by changing the flour and using xantham gum? Would it work ok? Thanks Gill

    • Jane's Patisserie on February 2, 2021 at 6:52 pm

      Yes!! As long as you double check all other ingredients as well obviously it works perfectly! x

  16. Kirsty on January 18, 2021 at 9:36 am

    5 stars
    My dad isn’t a huge chocolate fan but he does enjoy a galaxy chocolate bar. I made these for him for Fathers Day and he was very happy with them.

    • Elle on July 28, 2021 at 1:22 pm

      Hi. I doubled the buttercream mixture to decorate a cake. Added 1 tablespoon of boiling water and the buttercream separated. What did I do wrong? I normally would use milk in buttercream but used water this time and it was a disaster!

  17. Angie on January 5, 2021 at 9:57 pm

    How can I change the ingredients to cake a birthday galaxy cake rather than cup cakes

    • Jane's Patisserie on January 6, 2021 at 9:51 am

      I usually say one batch of cupcakes makes one 8″ cake that takes about 35 minutes to bake x

  18. Gill on December 27, 2020 at 9:32 am

    4 stars
    Jane, I don’t know what I’m doing wrong, my buttercream on these is so much lighter than yours every time I make them. Can I substitute some of the icing sugar for Cocoa to make it darker? Would 20g do it?

    • Jane's Patisserie on December 27, 2020 at 9:35 am

      You can do, but all photos will look a bit different to the end result, and as mentioned I used some of the darker collection in the buttercream as its what I had so that will have done it. x

  19. Ana Clara on December 8, 2020 at 6:32 pm

    I loved the recipe, I really like brown sugar but I never tried it on the cupcake. I will make the recipe and it will surely be successful !! Thank you!

  20. Sarah on October 31, 2020 at 3:31 pm

    5 stars
    Hi Jane,
    I was wondering if i could leave out the galaxy chunks since i just want a plain chocolate cake recipe.

  21. Sam on October 21, 2020 at 8:51 pm

    These look amazing!
    I want to make this into a birthday cake tomorrow in 3 9 inch tins would I still just triple the recipe and do you have an idea how long I would have to cook for thank you!!

    • Jane's Patisserie on October 22, 2020 at 3:14 pm

      Unfortunately I don’t usually bake 9″ cakes so I am insure on timings I am afraid, but yes I would say at least triple it, maybe even x4?

  22. Liza on October 13, 2020 at 6:15 pm

    Hi Jane recipe looks amazing! I was looking to bake these but in a 3 8inch cake tins. I was wondering would I need to triple the ingredients please? If yes would that also be for the buttercream if I was to cover the sides and have inside too please? Thank you xx

    • Jane's Patisserie on October 13, 2020 at 9:48 pm

      Yes tripling would be good – bake the layers for about 35 minutes! And 3x buttercream would be good! x

    • Liza on March 15, 2023 at 6:26 pm

      Hello I am looking to make this into a cake version but only have large eggs.. How many should I use please if making into a 9 inch cake? X

  23. Gillian on October 7, 2020 at 3:59 pm

    Hi Jane!

    I’ve just made these cupcakes, haven’t tried them yet but they look good. 🤞🏽 Just wondering if I can save the leftover buttercream? If so, how would I store it?

    There is so much left over I just can’t bring myself to throw it away. Not too sure why so much leftover, though I’ve a feeling it’s because I’m so rubbish at piping cupcakes! 🤦🏼‍♀️

    • Jane's Patisserie on October 8, 2020 at 9:42 am

      You can keep buttercream in the fridge for two weeks, or freeze for three months! Both ways the buttercream needs bringing back to room temperature and then re-mixing! X

  24. Janiz Djafer on October 5, 2020 at 10:17 am

    5 stars
    Hi, I love all your recipes! What if you only wanted to make 6?

    • Jane's Patisserie on October 5, 2020 at 12:11 pm

      You can try and half the recipe but because of the eggs I usually say it’s easier to use 2/3 of the recipe (so a two egg mix) and just put a bit more mix in each cupcake, or have 1-2 spare cupcakes!

  25. Charlotte on August 28, 2020 at 10:36 am

    5 stars
    Hi Jane can you freeze the sponge once you have baked it?

  26. Jacqueline Pratley on August 21, 2020 at 10:31 pm

    5 stars
    Ive made these galaxy cupcakes today, smell and look delicious , thank you for sharing your recipes,👍👌

  27. Emma McBurney on August 3, 2020 at 2:08 pm

    5 stars
    Fabulous recipe, thank you! I used a mix of galaxy and the darker galaxy for the icing and it was yummy!
    Also I didn’t have any brown sugar so just used caster sugar and it still worked well 🙂
    Just wondering, with the chopped galaxy in the cupcake, how finely do you chop?

    • Jane's Patisserie on August 3, 2020 at 2:25 pm

      I chop don’t chop the pieces that finely really, about 1cm pieces I guess?!

  28. Rohini Takhar on July 25, 2020 at 11:12 am

    Hi Jane I was wondering if you have a recipe using fresh cream instead of butter cream that would still give me the effect you have for the galaxy cup cakes. My family aren’t keen on butter cream.

    • Jane's Patisserie on July 25, 2020 at 2:17 pm

      Just whip 300ml double cream with 2tbsp of icing sugar!

  29. Sam on July 4, 2020 at 11:17 pm

    Hi Jane, if I just wanted to make 4, what would be recipe? Like how many eggs etc? Xx

    • Jane's Patisserie on July 5, 2020 at 11:31 am

      Use 1/3 of the recipe – so one egg!

  30. Chanel Phillips on July 3, 2020 at 2:49 pm

    Could i use Galaxy Carmel for inside the cupcake and for decoration? xx

  31. Gracie Cain on June 17, 2020 at 10:00 pm

    Hey! I’ve used this recipe before for cupcakes how would I make this a three layer cake made in 7inch tins. This is for a birthday on Saturday?

  32. Alishia on June 16, 2020 at 3:54 pm

    Hi Jane!

    I’ve done a few of your amazing cheese cakes recently, however this weekend I’m attempting a 3 tier cake, and I’d love to use this galaxy buttercream, how much of each ingredient would I need please for a 3 tier cake?

    Thanks in advance xx

    • Jane's Patisserie on June 16, 2020 at 9:25 pm

      Hiya – that depends on if you are just filling the layers, or the sides as well. But probably 3x!

    • Alishia on June 17, 2020 at 2:45 pm

      Sides as well!.. thank you! 3x it is!


  33. Lois F on May 29, 2020 at 9:34 pm

    5 stars
    I absolutely love this recipe! Make it every week 😋 my question is could it be changed from cupcakes to a 2 tier cake?

    • Jane's Patisserie on May 30, 2020 at 4:32 pm

      Ahh yay! Yes you can – I usually say one batch of cupcakes makes one layer of an 8″ cake!

  34. Molly on May 23, 2020 at 9:44 pm

    5 stars
    Absolutely loved these! When I made the buttercream, it was really runny. It kept dripping out the piping bag, was my butter too soft maybe? Thank you, molly x

    • Jane's Patisserie on May 24, 2020 at 8:55 am

      What type of butter did you use? xx

    • Molly on May 24, 2020 at 2:56 pm

      Most likely the wrong one 😂 I’d used a block of unbranded unsalted butter for the main recipe but I’d run out of what I had been using by the time I got to the buttercream. I ended up using a Lurpak spread but it was sooo soft! Like, runny soft. X

    • Jane's Patisserie on May 24, 2020 at 3:06 pm

      Hey! Yes that will have been the problem – you must use block unsalted butter for buttercream! If anything, lurpack would work for the sponge, but it’s too soft for buttercream! sorry!! x

  35. Berenice on May 17, 2020 at 12:59 pm

    5 stars
    Love them my first batch I doubled the recipe popped them in the oven then realised I had only put 3 eggs in 🙈🙈🙈 2nd attempt worked much better xx

    • Jane's Patisserie on May 17, 2020 at 3:43 pm

      Hahah oh gosh!! I’m glad the second batch worked well! x

  36. Katie on May 3, 2020 at 10:49 pm

    I can even begin on these recipes. They are fool proof! And so so delicious!

  37. Catherine on April 21, 2020 at 6:56 pm

    5 stars
    I would love to make this into a 3 layer cake, what amount do you advise multiplying the recipe by? thanks x

    • Gillian on July 4, 2020 at 2:07 pm

      5 stars
      I made these and they were absolutely delicious, everyone loved them! I’m just wondering how you got the colour of your icing to be such a wonderful dark colour, I followed the recipe as above and mine just looked a little pale but then maybe it’s just the difference of the photographs or something?

    • Jane's Patisserie on July 4, 2020 at 6:59 pm

      Hey! No as mentioned on the post I used some of the darker collection of galaxy which is why it’s darker! x

    • Jayne Callanan on January 27, 2022 at 2:07 pm

      5 stars
      Made these last week.for a party and they went down a treat, absolutely delicious. My mum is going to be 70 in a few weeks and loved them so I am going to attempt a birthday cake with this recipe. Thank you for sharing.

  38. Charlie on March 30, 2020 at 8:11 pm

    Hi, stupid question perhaps but if I wanted to half the recipe, how many eggs would I need to use?

    • Jane's Patisserie on March 31, 2020 at 10:29 am

      You can easily either do 1/3, or 2/3, but half is hard. A full batch uses three eggs, so you can’t really use 1.5 eggs.

    • Charlie on March 31, 2020 at 4:22 pm

      Ok, thank you. I tried the recipe today but used dairy milk chocolate instead of galaxy as I didn’t have any and it was lovely – thank you! x

  39. Charlie on March 30, 2020 at 7:36 pm

    Hi Jane, could you please let me know whether this recipe would be suitable for a tray bake (30x20cm tin)?

    • Jane's Patisserie on March 31, 2020 at 10:30 am

      Hey – you can do, but the ingredients will change quite a lot – have a look at my G&T traybake for a guide of ingredient amounts.

  40. Rayne on February 27, 2020 at 6:37 am

    5 stars
    Love this recipe if I wanted to make 18 though could I just half the ingredients and add them to the original recipe ? Thank you! xx

  41. Lili on February 9, 2020 at 11:28 am

    5 stars
    Made these!! Another fab recipe!!

  42. Anabela on January 31, 2020 at 11:53 pm

    5 stars
    Amazing 😋

  43. Ellen Hickey on January 31, 2020 at 8:00 pm

    Hi Jane, I love all your recipes you are truly amazing, I am just wondering where you buy your galaxy dark chocolate?

    • Jane's Patisserie on February 1, 2020 at 9:59 pm

      I’ve bought it in Tesco before, but you can buy it online!

  44. Helen on January 29, 2020 at 10:40 am

    Cooking these ASAP. Can I replace the s/r flour with gluten free s/r flour. X

  45. Amanda on January 29, 2020 at 8:21 am

    Can’t wait to try these Jane, thank you for all your lovely recipes they are always delicious xx

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