Malteser Traybake Cake!

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Thick and Fudgey Malteser Traybake Cake with a Malt Fudge Sponge, Malt Buttercream Frosting and Maltesers! 

It’s been a while since I shared a traybake cake recipe, and all in all, I’ve only ever posted a few on my blog… It’s definitely an underrated type of bake, and I need to rectify my lacking in recipes urgently. 

The last traybake cake I shared was my Chocolate Cake Traybake back in August, and even though it’s been a long old while since then, that cake is still SO popular these days! 

The cake has been so popular because it’s essentially a traybake form of my Chocolate Fudge Cake, and who doesn’t love a traybake cake for a party?!

Think about those chocolate traybake cakes you can buy from the supermarket (which are epic), and then multiply the epic-ness by 100. 

I’m not trying to blow my own trumpet here, but the cake really is epic and utterly DELICIOUS. However, I have had requests and requests for more traybake cakes, just like that one! So… here is the Malteser version. 

Yeah, that’s right, the Malteser version. I am utterly head over heels in love with this beauty, and I can’t stop the love. It’s based on my Malteser Cake, and then also the Chocolate Cake Traybake. The morphing of the two, into heaven in a bite. 

The premise of the bake is essentially the exact same, but just better. I went for a Malt Chocolate sponge, and a Malt Buttercream Frosting because it just tastes sooo good along with the Malteser, and I can’t get enough. 

Whenever in recipes I say “malt powder” I mean Horlicks or Ovaltine – I’m not sure what the equal to these are in other countries like America, but here they are a delicious warming drink that’s kinda like hot chocolate, but not chocolate. 

If you like Maltesers, I’d be surprised if you didn’t like Malt drinks.. but you know, weird things can happen! The one thing I wouldn’t recommend for the cake or buttercream though is the Malteser Hot Chocolate as that’s not the best for baking.

I’ve tried using the Malteser Hot Chocolate in bakes a few times, but it’s structure and ingredients are just completely different, and it’s designed to be mixed with water rather than milk so can work out oddly. 

If you use an actual Malt Drink such as Horlicks or Ovaltine, you will get a much much better flavour!

One thing I will say AGAIN with this Fudgey type cake recipe is that the coffee is IMPORTANT. Don’t worry, you can NOT taste the coffee in the cake, but it just enhances the richness of the chocolate in the sponge and takes it to the next level.

Please, for the love of god, don’t take out the coffee. People I know aren’t the biggest coffee drinkers, and some even hate it, but they all say they can’t taste it in the recipe and it is delicious. 

This recipe is wonderful, it is Malteser heaven, and I hope you all love it too! Enjoy! x

Malteser Traybake Cake!

Thick and Fudgey Malteser Traybake Cake with a Malt Fudge Sponge, Malt Buttercream Frosting and Maltesers! 
4.46 from 11 votes
Print Pin Rate
Category: Cake
Type: Traybake
Keyword: Maltesers
Prep Time: 15 minutes
Cook Time: 50 minutes
Decorating Time: 20 minutes
Total Time: 1 hour 25 minutes
Servings: 25 Pieces
Author: Jane's Patisserie


Cake Ingredients

  • 250 g Dark Chocolate
  • 250 g Unsalted Butter
  • 2 tsp Coffee Granules
  • 125 g Malt Powder (Horlicks/Ovaltine)
  • 200 g Plain Flour
  • 35 g Cocoa Powder
  • 1.5 tsp Baking Powder
  • 1/2 tsp Bicarbonate of Soda
  • 250 g Golden Caster Sugar
  • 250 g Light Brown Sugar
  • 4 Large Eggs
  • 100 ml Buttermilk

Decoration Ingredients

  • 200 g Unsalted Butter (room temp)
  • 400 g Icing Sugar
  • 75 g Malt Powder (Horlicks/Ovaltine)
  • 2-4 tbsp Boiling Water
  • 200 g Maltesers


For the Cake!

  • Preheat your oven to 160C/140C Fan and line a 9x13" Tin with parchment paper.
  • In a heatproof bowl, microwave the Dark Chocolate and Butter till melted - I do mine in 30 second bursts!
  • Add your Coffee Granules and Malt Powder to a small bowl, and add in 150ml Boiling Water. Whisk till smooth!
  • Add this to your Chocolate/Butter mix and whisk again till smooth.
  • In a large bowl, add your Plain Flour, Cocoa Powder, Baking Powder, Bicarbonate of Soda, Golden Caster Sugar and Light Brown Sugar and whisk till distributed evenly!
  • Whisk the Eggs and Buttermilk together till smooth.
  • Add your melted Chocolate mix to the bowl, and your Egg/Buttermilk mix, and fold all the ingredients together till they are combined - I use my hand and a spatula, and not an electric mixer as I don't want the ingredients to over mix.
  • Pour the mixture into the lined tin, and bake in the over for 50-60 minutes, or until baked through.
  • Leave to cool in the tin for 10-15 minutes, and then on a wire rack fully!

For the Decoration!

  • With an electric mixer, beat your butter on it's own for a few minutes so it's lovely and supple.
  • Add in your Icing Sugar 1/2 at a time and beat for a few minutes!
  • Add in your Malt Powder, and beat again - if its stiff, add in 1tbsp of Boiling Water at a time and beat fully each time till its a thick but spreadable and smooth consistency!
  • Spread over the cake with an angled spatula, and then sprinkle over some Maltesers and some crushed Maltesers!


  • This cake will last for 3-4 days+ at room temperature in a cake box!
  • This Is The Cake Tin I Used 
  • If you don't want to use Malt Powder, up the coffee to 1tbsp, and lower the water to 125ml - and just leave it out of the frosting!
  • The cake can take longer to bake in some ovens if they're not the correct temperature - or if the mixture is over mixed!
  • You can make your own buttermilk by using the same quantity of WHOLE milk, and 2tbsp of Lemon Juice - but I prefer the actual buttermilk you can buy!
Nutrition Facts
Malteser Traybake Cake!
Amount Per Serving
Calories 410 Calories from Fat 189
% Daily Value*
Fat 21g32%
Saturated Fat 13g81%
Cholesterol 75mg25%
Sodium 83mg4%
Potassium 231mg7%
Carbohydrates 53g18%
Fiber 2g8%
Sugar 42g47%
Protein 4g8%
Vitamin A 525IU11%
Vitamin C 0.2mg0%
Calcium 69mg7%
Iron 2.1mg12%
* These are only estimates and can vary dependant on brands of ingredients and serving sizes.


Find my other Millionaires & Malteser Recipes on my Recipes Page!

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J x

© 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.

About Author

Hiya! I'm Jane, and I adore baking, cooking and all things delicious. I'm also partial to homewares, lifestyle posts and more!


  • Emma
    October 25, 2020 at 3:42 pm

    5 stars
    This is sooooo delicious! Mine sunk a little too but who cares when it tastes so great? Thank you so much for continuing to give us such lovely FREE recipes!

  • Alison
    September 30, 2020 at 8:34 pm

    4 stars
    Hi Jane,
    I made the Malteser traybake with my girls and it turned out pretty well. It did sink in the middle slightly but the cake was so lovely and rich because of the dark chocolate. If I made it again, I’d probably do less of the buttercream (just personal preference) but my youngest had a great time helping! I’ve given a third of it away to the neighbours and we still have a load left over!

  • Lily
    September 26, 2020 at 11:02 am

    Hi I’ve made this traybake before in the 9 x 13 inch tin you suggested. It turned out amazing, the best cake I’ve ever made/tasted! However I had to give a fair bit away to my neighbours as it was too much for 2 people!

    I’m craving it again now but I want to make a smaller amount in an 8 x 8 tin. Should I use 2/3 of the recipe?


  • Ellie
    September 22, 2020 at 10:29 pm

    Hi Jane, do you think halving the recipe to use 9” square tin would be ok? Or maybe 2/3? I don’t need such a big cake – just wondering if there was away to make it smaller? Thanks!

  • Janice
    September 6, 2020 at 4:43 pm

    4 stars
    Love the texture of this cake. Mine sunk in the middle as I had to check on it after 55 minutes (took 80 minutes at 140 degrees in my fan oven) but after icing/decorating you could hardly tell. I think the buttercream icing amounts could be reduced as the icing layer was quite thick but otherwise I will definitely try make this again!!

  • Chloe
    July 26, 2020 at 11:10 am

    2 stars
    Read the comments and had the same issue as a lot of people. Took significantly longer to bake than 60mins and the cake came out as a dense brownie texture. Definitely wasn’t over mixed as just brought the ingredients together by hand. Still tastes good but not what I was hoping for

    • Jane's Patisserie
      July 26, 2020 at 5:50 pm

      As mentioned it can take longer to bake – it is that sort of cake that can vary due to ovens! Also, it’s meant to have a denser texture as it’s a fudge cake type sponge, not a classic basic sponge, so sorry it wasn’t for you!

  • Catherine Sutherland
    July 18, 2020 at 6:00 pm

    Hi Jane,
    This looks amazing and planning on baking this next. Is it possible to freeze this once it’s baked and frosted?
    Many thanks x

  • Karina
    July 3, 2020 at 3:48 pm

    Mine sunk in the middle before I had even opened the oven door. Could I have overmixed it? We used ordinary caster sugar as the supermarket did not have golden. Any tips?

    • Jane's Patisserie
      July 3, 2020 at 3:53 pm

      That is usually because of over mixing yes – using white caster sugar vs golden won’t make a difference. x

  • Ann
    June 23, 2020 at 7:39 pm

    HI Jane I only had Malteser chocolate egg shell & normal caster sugar not golden it seems ok & is cooking atm so fingers crossed it turns out ok.

  • Sharron
    June 8, 2020 at 5:48 pm

    5 stars
    Well, cake is in the oven as we speak. Hopefully it will turn out okay as I’m loving your recipes. This one, for me, is a little bit of chocolate indulgence.
    Most of your Amazon shop items are out of stock so having to compromise.
    Any chance of a Keylime Pie (No bake) pretty please?

    • Jane's Patisserie
      June 8, 2020 at 7:36 pm

      Hiya! Ahh yay! I hope you love the cake!! And I do have a classic (baked) key lime pie recipe in my first ebook, so it may be a good while before I do a no-bake pie!! And I know right?! I need my own supplies and they’re all out of stock haha! xx

  • Carla
    March 24, 2020 at 9:41 am

    5 stars
    Wish I could upload a picture, the best cake recipe I have ever used 😍 thank you!!

  • Cynthia Caton
    September 30, 2019 at 12:20 pm

    Would this recipe cook in a 9x9x2inch square tin please ?

    • Jane's Patisserie
      September 30, 2019 at 6:47 pm

      Hiya – no it won’t. A 9″ square is only roughly 2/3 of the tin needed, so it definitely won’t work.

  • Iris
    September 23, 2019 at 5:47 pm

    5 stars
    This cake is DELICIOUS, I made it once and will be definitely making it again my whole family loved it! This recipe is amazing thank you so much xx

  • Lesley Robinson
    August 28, 2019 at 6:10 pm

    What level for a gas cooker please?

  • Kathleen
    August 20, 2019 at 5:05 am

    What percent chocolate did you use?

    • Jane's Patisserie
      August 20, 2019 at 10:45 am

      I generally use 80% or so, but the minimum you should use is 70%!

  • Anne
    August 6, 2019 at 12:10 pm

    5 stars
    Made this twice now and it’s delicious! Only problem I’m getting is it sinking in the middle! I’m following the recipe to correctly so I’m a lil confused!

    • Jane's Patisserie
      August 6, 2019 at 7:41 pm

      99% of the time I believe a cake sinks because the oven door is opened too early, or the cake is taken out too early, which will cause it to sink. x

    • Jo
      August 24, 2019 at 9:57 pm

      I found mine had sunk in the middle too. It tastes amazing – and the middle pieces just have thicker frosting but I didn’t open the door until 60min had gone by and a skewer came out clean. I’m not sure what I did wrong?
      Ps thank you for such amazing recipes! Xx

    • Jane's Patisserie
      August 25, 2019 at 1:55 pm

      Sometimes cakes can take longer to bake, despite using a skewer. The cake can take longer than 60 minutes as mentioned in the notes depending on your oven! You need to listen to the cake when the skewer is coming out clean, and if its bubbling, put it in for a little longer!

  • Jen
    June 25, 2019 at 5:57 pm

    Hi Jane, I made this last week and IT WAS AMAZING!!!! Please keep posting recipes, i get inspired! xx

  • Shaz
    June 21, 2019 at 11:16 am

    Can I use regular sugar instead of folder caster sugar?l

    • Jane's Patisserie
      June 21, 2019 at 9:08 pm

      Do you mean white caster sugar instead of golden caster sugar? If so, yes – but golden caster sugar tastes lovely!

  • Alice
    June 20, 2019 at 3:07 pm

    5 stars
    I had a go at making the cake, texture is more like a brownie than a sponge cake, but it tastes delicious. Should the cake be quite moist in the middle, or have I not cooked it for long enough?

    • Jane's Patisserie
      June 20, 2019 at 7:17 pm

      It’s a Fudgey cake and not designed to be like a regular Victoria sponge – but it may be slightly under baked.

  • Sharon
    June 15, 2019 at 2:34 pm

    Jane have you got a cookery book out as your recipes are AMAZING 😊

  • Sian Adger
    June 15, 2019 at 12:04 pm

    5 stars
    Looks delicious, I love all of your bakes. I shall definitely be making this one!

  • Jude
    June 15, 2019 at 11:44 am

    Hi Jane,
    Can I just ask, does it definitely need half a kilogram of sugar in the cake ? It just seems like an awful lot !
    Would it be possible to just use 250g of either golden caster or soft brown Sugar ?

    • Jane's Patisserie
      June 15, 2019 at 12:25 pm

      For the recipe to turn out correctly, the sugar is important – the cake easily serves 20, so it’s really not that much per person at all.

    • Lomastha
      June 3, 2020 at 9:53 pm

      4 stars
      I have made this cake using 350g sugar and it turned out perfectly. Lovely recipe.

  • Andrea
    June 15, 2019 at 9:59 am

    Is it ok to use milk chocolate instead of dark?

    • Jane's Patisserie
      June 15, 2019 at 12:26 pm

      No, PLEASE use dark – the sponge will not be the same with milk chocolate.

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