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 Slow Cooker Desserts 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!

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.

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

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

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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.
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Recipe

Slow Cooker Chocolate and Mint Aero Bubble Cake
Ingredients
- 190 g (1.5 cups) plain flour (all-purpose flour)
- 1 tsp baking powder
- 50 g (0.66 cups) cocoa powder
- 200 g (0.9 cups) light brown sugar
- 125 g (4.5 oz) butter
- 3 eggs
- 180 ml (0.75 cups) milk I used semi-skimmed
- 1 large share bag of Mint Aero Bubbles
Equipment
Instructions
- Grease and line the slow cooker bowl.
- Mix the flour, baking powder and cocoa powder in a large bowl.190 g / 1.5 cups plain flour (all-purpose flour), 1 tsp baking powder, 50 g / 0.66 cups cocoa powder
- Cream the butter with the sugar then add the eggs slowly, mixing after each addition.200 g / 0.9 cups light brown sugar, 125 g / 4.5 oz butter, 3 eggs
- Add the milk and whisk until smooth.180 ml / 0.75 cups milk
- 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.1 large share bag of Mint Aero Bubbles
- Put the lid on and turn the slow cooker onto high.
- Cook for 2-3 hours on high until firm.







Sew White says
I am so trying this!
Nicki says
Hiya yes I did it with the skewer. It turned out well anyway. Not all the balls melted into the cake because I added more. It was delish. Thanks for your replies.
bakingqueen74 says
Great!
Nicki says
I’ve just made the mint aero cake and it looks pretty good, haven’t tasted it yet as its for my work colleagues tonight. The only thing I have a problem with it testing to see if it’s cooked in the middle because of the mint aero balls as obviously they don’t set. So I have a tendency of the sides being over cooked. Any suggestions?
bakingqueen74 says
I usually use a skewer or cake tester, it should be quite easy to see if the cake is firm or not by checking an area without the chocolate, the aero balls usually melt into the cake I find. Good luck!
Nicki says
I’ve just made this cake and added orange matchsticks instead and it’s absolutely gorgeous. The best chocolate cake I’ve ever made. Thank you for the recipe.
bakingqueen74 says
Great! it sounds lovely with orange matchsticks
lisa says
Hi ive got a round slow cooker instead of oval. My cakes been cooking for 2 hrs and looks cooked at the top but when i put a skewer in its not clean should i take it out and hope it continues to cook the middle?
bakingqueen74 says
Turn it into low for a bit so it doesn’t burn!
Helen says
HI used a 6.5 l with the above recipe and it was really good. Just wondering whether you can get away with baking it for longer on low setting? Thinking it would be good to take skiing and come home to some lovely cake!
bakingqueen74 says
Hi, it doesn’t tend to rise as well on low I find with cakes, but you could try it!
Kelly anne meese says
When you say 1. Grease and line the slow cooker bowl. Do you use baking sheet/paper to line the bottom and just grease the sides?
bakingqueen74 says
I greased the base and sides of the pot then lined the base only for this cake but since then I usually now grease the pot and line the whole bowl using baking paper or a large cake tin liner, as you can then use the paper or liner to pull the cake out. hope that helps!
Kelly anne meese says
What would you recommend as I have a 6.5l slow cooker. Can I just follow what it say and make a smaller/flatter cake or not or do I need to do something else.
bakingqueen74 says
You could double it for a very big cake or use a deep cake tin inside your slow cooker if you have one that fits?
chris says
Did this last weekend and it was amazing, thanks. I added white aero balls too but was a bit pointless as the mint overpowered the white. I got it in again now but without aero balls instead using cream eggs and topping after with flakes!!!!
bakingqueen74 says
yum, enjoy!
kylie says
Not tried this but have made salted caramel peanut butter cookie dough n used that n omg that’s the most amazing thing ever
sharron says
p.s….that cake tastes absolutely amazing, I’m so proud of myself, that’s the first cake I’ve baked in years…ty 74…X
bakingqueen74 says
excellent!
sharron says
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….
bakingqueen74 says
Hi, no that is normal as the cake rises as it bakes, just put some more on! Hope it turned out well
Annie says
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
hayley says
Hi, this looks lovely. Do you use salted or unsalted butter?x
bakingqueen74 says
Hi Hayley, I always use unsalted in cakes.
hayley says
Thank you, I did think so but like to double check. X
Rob says
Could this just be cooked in the oven? what’s special about the slow cooker?
bakingqueen74 says
Hi Rob, the cake could of course, I have done it several time successfully, but the Aero bubbles wouldn’t stand up to being baked in the cake. I like baking in the slow cooker, that is all! 🙂
Rob says
Out of interest what would the cooking times and temperature be in the oven? I still may use the slow cooker tho! 🙂
bakingqueen74 says
About 25 mins at 180 in a fan oven, based on splitting it in two sandwich tins.
Hannah says
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.
bakingqueen74 says
Hi, I lined it with baking paper on the base and a little on the sides. Best to line it or you won’t find it easy to get it out when cooked without breaking it!
Jay Stevens says
Hi I’m Diabetic but this looks good! What sugar substitute would you suggest please?
bakingqueen74 says
Hi Jay, i dont know anything about diabetic substitutes so can’t help there.
Rachel says
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 !!
bakingqueen74 says
was it good?
Kerry says
Hi how many portions do you think this makes ? Many thanks
bakingqueen74 says
Really depends on your portion size! but I’d say at least six, it is quite rich.
Rhys says
Looks Incredible! Will definitely be giving this one a go, thanks!
bakingqueen74 says
Great, enjoy it!
Tony says
Hi
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.
Thanks
Tony
bakingqueen74 says
Hi Tony, yes that is fine, all slow cookers cook differently, in fact the one I used to make this cake does cook quite slowly. Enjoy!