Slow Cooker Chocolate and Mint Aero Bubble Cake

Slow Cooker Chocolate and Mint Aero Bubble Cake

 Slow Cooker Chocolate and Mint Aero Bubble Cake – a delicious chocolate fudge cake baked in the slow cooker with Mint Aero Bubbles! Baking in the slow cooker is so easy. The most popular recipe on my blog. Look in my Recipe Index for loads more slow cooker cakes and bakes!

So it is Good Friday and I am bringing you …..more chocolate! Well it can’t be avoided, this is the time of year for it after all. 🙂

This slow cooker chocolate and mint aero bubble cake is a cake with a difference as it is made in my slow cooker (3.5 litre oval slow cooker).

I decided to make a slow cooker chocolate and Mint Aero Bubble cake quite simply because I wanted to see the Aero Bubbles in a cake!

I have seen Maltesers and similar being used in traybakes (do make the Malteser traybake, it is delicious!) but I wanted these to go in a cake, not a no-bake or brownies. I thought the cake would look great when sliced as you would see the green circles against the dark brown chocolate cake, as well as the bubbly texture of the bubbles against the velvety cake. Well that was the idea anyway!

I saw in the traybake etc recipes that sometimes they froze the Maltesers or Aero bubbles overnight so they didn’t melt when baking. I didn’t have the patience for that so just went for it. Sometimes you just want cake then and there, am I right.

Ready to start baking! The base is lined with baking paper. I would line the sides of the pot too to make it easier to get out!

Slow Cooker Chocolate and Mint Aero Bubble Cake - BakingQueen74

This is what it looked like after 45 mins. The edges are becoming firm and the Aero bubbles are melting! Just look at that rich chocolate colour, mmmmm.

Slow Cooker Chocolate and Mint Aero Bubble Cake - BakingQueen74

Another hour later, after adding more Aero Bubbles in the centre. The cake is starting to firm up.

Slow Cooker Chocolate and Mint Aero Bubble Cake -

Finished, after two and a quarter hours. Yummy, rich and fudgy chocolate cake topped with minty chocolate!

Slow Cooker Chocolate and Mint Aero Bubble Cake

Join all the hundreds of thousands of people who have read my recipe for my slow cooker chocolate and mint Aero bubble cake below!

Slow Cooker Chocolate and Mint Aero Bubble Cake

If you like this recipe, make sure you look at my guide to baking in a slow cooker with loads more slow cooker cakes, desserts and bread recipes! If you have any questions do leave a comment, I reply to as many as I can!

See also my Slow Cooker Archives for loads more slow cooker recipes including family recipes.

Pin my slow cooker mint aero bubble cake recipe for later:

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Slow Cooker Mint Aero Bubble Cake

Slow Cooker Chocolate Mint Aero Bubble Cake by BakingQueen74

Slow Cooker Chocolate and Mint Aero Bubble Cake

A delicious rich chocolate cake baked in your slow cooker with added Mint Aero Bubbles
4.5 from 4 votes
Print Pin Rate
Course: Baking
Cuisine: Slow Cooker
Prep Time: 5 minutes
Cook Time: 3 hours
Total Time: 3 hours 5 minutes
Servings: 8
Calories: 411kcal
Author: bakingqueen74


  • 190 g plain flour
  • 1 tsp baking powder
  • 50 g cocoa powder
  • 200 g light brown sugar
  • 125 g butter
  • 3 eggs
  • 180 ml milk I used semi-skimmed
  • 1 large share bag of Mint Aero Bubbles


  • Grease and line the slow cooker bowl.
  • Mix the flour, baking powder and cocoa powder in a large bowl.
  • Cream the butter with the sugar then add the eggs slowly, mixing after each addition.
  • Add the milk and whisk until smooth.
  • Fold in the flour mixture.
  • Pour the cake batter into the slow cooker bowl.
  • Add about half the Mint Aero Bubbles, scattering them over the top.
  • Put the lid on and turn the slow cooker onto high.
  • Cook for 2-3 hours on high until firm.


Line your slow cooker bowl with baking paper so you can remove the cake in one piece.
Tried this recipe?Tag me @bakingqueen74 or use hashtag #bakingqueen74!



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That looks very fudgy, I can imagine it’s the kind of cake that clings to the top of your mouth, yum! Thanks for linking up to Sweet and Savoury Sunday, stop by and link up again. Have a great weekend!!


A note for myself – as we are dairy free will use Raspberry Ruffle bars chopped up and Pure soya spread in place of butter and goat milk


Thanx for this tip. We are also dairy free and had no idea that raspberry ruffles were dairy free.x


Hi, I’m just wondering what you line the slow cooker with in step 1? I’ve never done a cake in it before. This recipe looks lovely. Thanks


If you grease your slow cooker with butter then dust all over that with flour, it saves the need for greaseproof paper. 🙂

Allison Webb

Made it for the first time today and it was delicious! Not stodgy and not too sweet! Thanks for the recipe. I was suprised by how much it rose and I had the lid off a few times to check it was cooked.

Donna Drew

Just put mine in now for Crochet group they enjoyed the giant cookie last time.


Great idea, did this today cooking times vary slightly mine took just over 3 hrs but is amazing !!! Thanks for the idea will be keep this for another time


Hi. Have cooked this for about 2 hrs 20 mins. All the top has holes in. How did you get the cake out of the slow cooker, did you leave it to cool first ??


Hi I use this recipe to make malteser cake or galaxy counters cake but I use a large cake case in the slow cooker to save all the messing lol thanks for sharing xx

Wow this looks amazing. Have just pinned it #recipeoftheweek

Oh my goodness, this looks lovely. I never knew you could do cake in a slow cooker, must try it


Looks lovely. I’ve got a large slow cooker so I’m wondering if I could put the cake in a regular cake tin inside the cooker? If so would you need to put water in the base of the cooker around the cake tin?
Many thanks 🙂

First – this cake looks fantastic !!
And second – I’ve never baked a cake in a slow cooker and I’m intrigued 🙂


Hi, Just a quick (possibly quite blonde question); you say to grease and line the bowl of the slow cooker but in the pictures it doesn’t look like you did that? I assume you mean use grease-proof paper to cover the bottom and the sides of the bowl otherwise it wouldn’t come out? Is that right?
I’m not the biggest fan of mint aero, but want to try out making the cake in the slow cooker for sure! Thinking of other things I could exchange the aero for! Thanks, Amy

Karen arneil

Try orange aero bar broken up .it tastes great


Many Thanks! Looking forward to trying it!

becki watson

I have a 6.5l s.c would I just double up the recipe and time or would that not work. Ive never done a cake in s.c before so thanks for any tips x

Laura Dive

This recipe looks and sounds absolutely AMAZING!!
I WILL be making this very soon 🙂
What if before tipping the mixture into the slow cooker if i stirred in some of the bubbles? Do you think that’d just automatically melt the bubbles?


Also coating the bubbles after freezing means that they don’t all sink to the bottom… Also good advice for fruit in cakes 🙂
Great recipe!!! Love my s/c

Hamish McIntosh

do you use a tea towel under the lid to absorb the condensation for this cake, thanks in advance.

Hamish McIntosh

thank you very much ☺


oh my god! The only thing wrong with this recipe is IT TAKES SO LONG!!!!! I just can’t wait that long! Going to try it though x


I’ve done carrot cake in my slow cooker which turned out lovely so keen to try this one. never done any sort of chocolate cake what cocoa powder do you use please


Hi, I just wondered how long the finished cake keeps please. And does it freeze well?
Looking forward to trying it – might try with Aero Orange Bubbles too 🙂


Found mine was still quite soggy in the middle


Hi. Im concerned that the greaseproof paper will catch fire. Do u put it on the bottom of the cooker? On top of margarine or just a layer of papee? X


Would the malteezer cake be too crunchy inside ?? I was thinking of trying it today


can you just use self raising flour instead of buying plain flour and baking powder? thanks


I only have a rice cooker, will it work in that?


My aeros bubbles all melted I cooked it for 2 hours 10 mins why did they all melt ? Tastes nice though.


I used aero bars (they were on offer) and it was gorgeous. We had it warm with ice cream 🙂 thank you great recipe

Rosalind Blight

Have attempted this today. My house smells amazing only thing is my bubbles have all melted (and some crystallized) and the cake looks like it has little green craters all over it. Otherwise I am impressed as never cooked any cake in slowcooker before


This looks amazing, I’m going to try it tomorrow. I honestly didn’t know you could make cakes in the slow cooker! Thanks for enlightening me.


Hey all could u use Maltesers instead of the aero bubbles ? Xx

brenda m nash

I can’t wait to try this recipe. Love my slow cooker even more learning I can bake in it! Can you tell me if it’s possible to bake a Christmas Cake this way?

brenda m nash

Thank you. I will definitely visit the Facebook Page


Made this today.

This was my first attempt at a cake in the slow cooker so wasn’t sure what to expect but OMG IT IS AMAZING!!!!

Looks nothing like the picture as my bubbles melted but it sure tastes as good as the above picture looks.

I will be trying again.

Nicki Pearce

Hi, this cake looks great and I want to try it this weekend for a bake off at work! My slow cooker is 6.5l, so should I double mixture or leave it as the recipe states?

Heather Stanger

OMG I love cake – defo gonna try this maybe with different choc though – my slow cooker quite new and doesn’t need water but did you cook on high or low? X

brenda m nash

I baked mine in a loaf tin with a drop of water in the bottom of the slow cooker. It was delicious and was very easy to slice because of its shape and depth


seen this earlier and have been out for the ingredients already it looks too delicious to not make it right now! haha


It’s delicious….Made one before Christmas and now things have quietened down a bit – I’m going to make another this weekend.


Has anyone converted this recipe to imperial measurements?



Made one of these tonight and I only seems to have taken 1-45mins for it to go firm is this ok? Put a skewer thought it and it come out clean.



Looks Incredible! Will definitely be giving this one a go, thanks!


Hi how many portions do you think this makes ? Many thanks


Having a go at this right now !!!! It’s been in the slow cooker for just 30 minutes I cannot wait to see how it turns out !!

Jay Stevens

Hi I’m Diabetic but this looks good! What sugar substitute would you suggest please?


Hi. This looks amazing. But in the photo it doesn’t look like you have lined the pot with anything? Did you just grease it? Thanks.


Could this just be cooked in the oven? what’s special about the slow cooker?


Hi, this looks lovely. Do you use salted or unsalted butter?x


Just made this and it looks and tastes great, the aero bubbles did melt quite a bit and I forgot about lining it too! Doh! But still tastes great and will be sharing with the family at Sunday dinner tomorrow xx


hi 74, I’m just baking this now, yay, recipes for my slow cooker, you sure are great….what I’m asking is, I’ve spraed the aero bubbles around but they seem too have all congregated too the centre of the cake, am I doing something wrong….