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    Home » Recipes » Cakes » Layer Cakes

    Banana cake with chocolate buttercream

    By Erin Clarkson on Jul 24, 2016 (updated Mar 30, 2022)
    5 from 10 reviews
    20 community comments
    This post may contain affiliate links.

    Jump to Recipe

    This easy homemade banana cake with chocolate icing is a birthday party classic. The banana layer cake is quick and easy to make and pairs perfectly with the chocolate american buttercream.

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    Table of contents

    • Banana Cake with Chocolate Buttercream
    • The Best Banana Layer Cake
    • Easy Chocolate Buttercream
    • For more banana recipes, check out:
    • Recipe for Banana Cake with Chocolate Buttercream
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    Banana Cake with Chocolate Buttercream

    I feel as if this cake is a childhood memory for most kids that grew up in New Zealand. Homemade Banana cake, covered in what we affectionately refer to as "shitty chocolate icing". You know the stuff - icing sugar, cocoa, a little bit of butter, and then a little bit of boiling water which inevitably turns into adding too much, having to add more icing sugar, overshooting that, adding more water, etc etc. The best. We often had this as our birthday cakes when we were kids, but would have 'plain' icing instead that we were allowed to colour ourselves - I have very strong memories of managing to get half a bottle of yellow food colouring into a bowl of icing and having THE most bright yellow cake ever. It was awesome. 

    Turns out Rich has even more ties to homemade banana cake than I do - he went to boarding school and quite often his mum would make him a banana cake with  chocolate icing to have in his 'tuck box'. Lucky for him, I tend to be useless at remembering to use bananas up before they go brown, so banana cake/bread/shortbread happens extremely frequently in our house. 

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    The Best Banana Layer Cake

    Rich also happens to not be a huge fan of buttercream. I have learnt to turn my back while he scrapes most of it off a cupcake into the bin. For this reason, (because he is the primary banana related baked goods consumer in our house), the ratio of this cake is mainly cake:not much buttercream. It is essentially two banana cakes, glued together with a teeny bit of buttercream. I like to run a line of piped buttercream between the two layers to tidy things up, then load up the top with icing sugar, pop on some rosemary, and we are away laughing. He requests it for his birthday every year, which makes life significantly easier on my part! 

    The cake itself is super simple. It is a great go-to. (as are most recipes from the Edmonds cookbook). If my bananas are super ripe, and I would like minimal dishes, I throw them in the stand mixer with the creamed butter/sugar mixture rather than mashing them by hand. If they aren't crazy ripe, mashing them by hand helps. 

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    Easy Chocolate Buttercream

    The buttercream is a slightly more fancy variation of "Shitty chocolate buttercream".  I like using butter straight out of the fridge and 'softening' it using the mixer, as opposed to softening it before you use it. It gives you a slightly colder finished product that is easier to handle. However I haven't tried this without a stand mixer, so if you are using an electric beater, it may be easier to have the butter already soft. The recipe here will leave you with some buttercream left over, which I figure is probably helpful as most people like a slightly higher ratio of buttercream to cake than this, so feel free to spread it on the top/sides. If you make this into a four layer cake (and slice the cakes into two), doubling the buttercream recipe would be beneficial.

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    This is a fairly large recipe, so if you only have a couple of bananas, or are looking for something smaller, halving it will work beautifully. 

    Ps how great is the crown cake stand?!? My Mum got it for me the last time I was home, from a teeny pottery shop near Nelson (my hometown). Its a one of a kind, and is inspired by Max's crown from "Where the wild things are". It also turns up the other way and can be used as a bowl! I LOVE it! Thanks Mama Bear! xx

    For more banana recipes, check out:

    • Banana Shortbread
    • Mini Banana Bundt Cakes with Coffee Salted Caramel
    • Banana Sheet Cake with Whipped Dark Chocolate Ganache
    • Nutella and Banana Rolls
    • Easy Banana Bread
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    ❤️ Made this recipe and love it? ❤️

    I would LOVE for you to leave me a review and star rating below to let me know how you liked it! Also, please make sure to tag me on Instagram!

    Answers to your baking questions

    Over the years, many of you have asked me questions about:

    • baking in grams
    • adjusting oven temperatures
    • what kind of salt to use
    • and many more!

    I've curated and answered them all for your easy reference in this frequently asked questions post!

    Recipe for Banana Cake with Chocolate Buttercream

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    Banana cake with chocolate buttercream

    5 Stars 4 Stars 3 Stars 2 Stars 1 Star 5 from 10 reviews
    • Author: Erin Clarkson
    • Prep Time: 1 hour
    • Cook Time: 30 minutes
    • Total Time: 3 hours
    • Yield: 12 servings 1x
    • Category: Cakes
    • Method: Baking
    • Cuisine: New Zealand
    Print Recipe
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    Description

    This easy homemade banana cake with chocolate icing is a birthday party classic. The banana layer cake is quick and easy to make and pairs perfectly with the chocolate american buttercream.


    Ingredients

    Scale

    Banana cake

    • 250g unsalted butter, at room temperature
    • 350g sugar
    • 4 eggs
    • 4 ripe bananas, mashed
    • 2 tsp (8grams) baking soda
    • 60g whole milk
    • 500g All-purpose flour
    • 2 tsp (8 grams) baking powder

    Chocolate Buttercream

    • 250g unsalted butter, at room temperature
    • 500g Icing Sugar/powdered sugar
    • 50g Cocoa Powder
    • 1 Tbsp Vanilla
    • 3 Tbsp (45ml) whole milk


    Instructions

    BANANA CAKE

    1. Preheat the oven to 350°f/180°c. Grease two 8 inch cake tins. 
    2. In the bowl of a stand mixer fitted with the paddle attachment, or in a bowl with an electric mixer, cream butter and sugar until light and fluffy. Add bananas and beat until incorporated. Add eggs one at a time, ensuring bowl is well scraped down and mixture is well combined. 
    3. Heat milk in the microwave, or a small pan until boiling. Add baking soda to milk, and add to the mix, mixing until well combined. 
    4. Sift flour and baking powder, and add to the mixture. Mix briefly until just combined. Divide between the two prepared tins, and bake 30-40 minutes until lightly golden, and a tester inserted in the middle of a cake comes out clean.  A ramekin of water in the oven with the cakes will help generate steam and reduce doming. If you don't mind the cake being a little more dense, you can also place a clean tea towel over the cake soon after it comes out of the oven and press down gently to help lessen the dome. Cool in their tins for 10 minutes, then carefully remove and allow to completely cool on a wire rack. 

    BUTTERCREAM 

    Beat the butter in the bowl of a stand mixer or with an electric beater until pale and fluffy. (if you are using a stand mixer, I find it best to 'soften' the butter from cold with the mixer). Add vanilla, and sifted icing sugar and cocoa, and beat until well incorporated. Add the milk and beat on high until whipped and fluffy. Transfer to a large piping bag fitted with a large round tip (I used an Ateco #808)

    ASSEMBLY 

    Level off the cooled cakes with a sharp bread knife or cake leveler. Place one cake right side up on a turntable or cake stand, and pipe a thick layer of buttercream onto the surface of the cake. Spread out with a small offset spatula, then place the second cake upside down onto the buttercream. Ensure that they are well aligned, then using the piping bag, pipe a continuous line of buttercream around the middle of the cake, where the two layers meet. You will likely have some buttercream left over so feel free to use this on the top of the cake. Dust top of the cake liberally with icing sugar, and garnish with your favourite herbs (I like rosemary). Enjoy!


    Notes

    Cake adapted from "Edmonds Cookbook"

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    Key Ingredients

    • American Buttercream
    • Banana
    • Chocolate
    « American Flag Cake
    Doughnut sprinkle cake »

    Filed Under: Layer Cakes

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      Comments

    1. Dhrubaa De Mukherjee says

      January 18, 2017 at 6:54 pm

      This is brilliant! Will have to try this too!

      Reply
      • Erin @ Cloudy Kitchen says

        January 22, 2017 at 11:54 pm

        It's super easy! and I dunno about you but I always have extra bananas hanging around!

        Reply
      • Ashleigh says

        February 17, 2024 at 3:15 am

        Going to make this for my sons first birthday next week! Just wondering if it would be okay to add vanilla extract?

        Reply
        • Erin Clarkson says

          February 17, 2024 at 3:42 am

          Yes you definitely can!

          Reply
    2. Sophie says

      March 17, 2022 at 4:40 am

      Love this recipe! Made it GF by subbing flour for 250g ground almonds and 250 g bakels GF plain flour and it was perfect. Banana cake with choccy buttercream icing - so nostalgic and so delicious!

      Reply
    3. Amara says

      November 20, 2022 at 4:33 pm

      Love this fancy version of the classic Edmonds banana cake! Making it a layered cake automatically makes it impressive.

      Reply
      • Hana says

        January 04, 2023 at 2:32 am

        Faultless as always with Erin's recipes, thanks!

        Reply
    4. Sara says

      March 17, 2023 at 4:54 pm

      Hi there-making this recipe for my Wild One themed baby’s first birthday. Question-you don’t have salt listed in the ingredients, but noticed you do for other cakes. Was it inadvertently omitted? Thanks for the great recipes, I appreciate all the detail!

      Reply
      • Erin Clarkson says

        March 18, 2023 at 6:11 pm

        Hi! Ah yes probably! use about 1/2 tsp kosher salt!

        Reply
    5. Rachel Osborne says

      April 21, 2023 at 2:19 am

      Great recipe, delicious cake!

      Reply
    6. Emma says

      December 14, 2023 at 6:29 pm

      I love this banana cake and the icing is incredible, my go to family birthday cake 🎂

      Reply
    7. Ashleigh says

      January 04, 2024 at 7:32 pm

      Absolutely love this recipe. On high rotation in our house! Thank you!

      Reply
    8. Emma Drew says

      February 11, 2024 at 6:50 pm

      I love this recipe and used it again this weekend for my daughter's birthday along with your buttercream recipe to ice the outside

      Reply
    9. Sasha Ward-Faint says

      September 19, 2024 at 5:43 pm

      Do you add the dissolved soda milk mixture hot to rest of the mixture? Or do you wait till it's cooled down? Or does the boiling milk cool down once soda is added...

      Reply
      • Erin Clarkson says

        October 06, 2024 at 3:45 pm

        Hi, I have always added it in hot 🙂

        Reply
    10. Amber says

      March 01, 2025 at 7:16 pm

      What a great recipe! I’ve made some subs (swapping in some sugar and adding some hazelnut flour) and it still works perfectly! It’s now my go-to banana cake recipe

      Reply
    11. Erin Clarkson says

      July 12, 2025 at 6:38 pm

      Hi, sounds like you may have used the wrong sized pan? Or an oven issue? It definitely shouldn't be raw in the middle!

      Reply
      • Hannah says

        July 12, 2025 at 7:40 pm

        I definitely used the right size pan. I double checked after to be sure. I'm not exactly sure what happened, because I never have problems with your recipes. It's possible my oven is colder, but I need to check. Because I don't necessarily think anything is wrong with your recipe, but I'm really confused what might have happened. The cooked parts are delicious. (Hence me changing the rating.)

        When it said ripe bananas, how ripe? And how big a banana?

        Reply
        • Zd says

          January 29, 2026 at 5:00 am

          Hi, may i check if i can use bundt pan for this?

          Reply
          • Erin Clarkson says

            January 30, 2026 at 3:27 pm

            I haven't tried it sorry!

            Reply
    Erin Clarkson Cloudy Kitchen

    HI, I'M ERIN

    My recipes range from quick & easy all the way to complex & impressive. I love the science and process of recipe development almost as much as baking itself. I specialize in rigorously tested recipes that are fun, reliable, and accurate.

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