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    Home » Recipes » Sweet Treats » Chocolate

    Marbled Chocolate Banana Loaf

    Published: April 13, 2023 by Andrea · This post may contain affiliate links. Please read the disclosures and disclaimers page for details.

    Jump to Recipe Pin Recipe

    This marbled chocolate banana loaf cake is honestly so good. It is made with two different flavoured cake batters so you can enjoy two cakes in one. The recipe is so easy to make and takes little time to prepare. 

    Marbled chocolate banana loaf cake

    Banana and chocolate always go well together and this loaf is no exception. As well as having two amazing flavours, the cake is super soft and moist.  

    I love to have this cake with a cup of tea or coffee and it never disappoints. If like me, you love banana and chocolate then you'll love this this chocolate banana loaf. 

    Ingredients for Marbled Chocolate Banana Loaf

    Please find the full list of ingredients and quantities in the recipe card at the end of the post. 

    • Butter - I use soft unsalted. 
    • Oil - I use vegetable oil but you can use any unflavoured oil. 
    • Sugar - light brown sugar or caster sugar. 
    • Eggs - use room temperature eggs. 
    • Vanilla extract - or vanilla bean paste. 
    • Soured cream - use fresh soured cream or natural yoghurt. 
    • Salt - sea salt or regular table salt. 
    • Flour - I use self-raising flour. 
    • Banana - only 1 over-ripened banana. 
    • Cocoa powder - unsweetened cocoa powder. 
    unbaked and baked batter

    How to Make Marbled Chocolate Banana Loaf

    1. Preheat the oven to gas mark 3/325oF/160oC/140oC fan and line a 2lb/900g loaf tin with parchment paper. Add the butter to a microwaveable bowl and melt for 35 seconds or until fully melted. 

    2. In a medium bowl, whisk together the melted butter, vegetable oil and sugar.  Mix in the eggs then the vanilla extract followed by the sour cream. Fold in the flour then pour half the batter into another bowl. 

    3. Mash the banana with a fork then add it to one of the bowls and fold it into the batter. To the other bowl, add the cocoa powder and mix until smooth. 

    4. Add a dollop of vanilla batter to the loaf pan then add some chocolate batter. Place the batter randomly in the tin to create a marble effect. Repeat this process alternating between both batters until all the batter is used. Bake the loaf in the centre of the oven for 60 minutes. The time may vary so check every 5 minutes once it has baked for 50 minutes.

    5. Remove the loaf from the oven and allow to cool in the tin for 40 minutes then remove the loaf cake from the pan and place directly on the wire rack to completely cool before slicing. 

    Marbled chocolate banana loaf cake

    Recipe Tips

    • This marbled loaf cake will taste best the following day after baking once the flavours have settled together.

    Nutrition

    Nutrition based on 1 serving - Calories: 231kcal | Fat: 10.6g | Saturates: 2.7g | Carbs: 30.0g | Sugar: 18.5g | Fibre: 1.1g | Protein: 3.7g | Salt: 0.43g.

    Storage 

    Store in an airtight container at room temperature for up to 4 days.

    You can also freeze the loaf by slicing and wrapping each slice in clingfilm. You can freeze for up to 2 months. 

    Marbled chocolate banana loaf cake

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    Chocolate Banana Loaf
    Print Recipe Pin Recipe

    Marbled Chocolate Banana Loaf

    This chocolate banana loaf is honestly so good. It is made with two different flavoured cake batters so you can enjoy two cakes in one.
    Prep Time10 minutes mins
    Cook Time1 hour hr
    Total Time1 hour hr 10 minutes mins
    Author: Andrea
    Yield: 10 servings
    Calories: 235kcal

    Ingredients

    • 15g unsalted butter
    • 70ml vegetable oil
    • 160g light brown sugar
    • 2 eggs room temperature
    • 1 teaspoon vanilla extract
    • 80ml soured cream fresh
    • ½ teaspoon salt
    • 160g self-raising flour
    • 1 large banana
    • 18g cocoa powder

    Instructions

    • Preheat the oven to gas mark 3/325oF/160oC/140oC fan and line a 2lb/900g loaf tin with parchment paper. Add the butter to a microwaveable bowl and melt for 35 seconds or until fully melted. 
    • In a medium bowl, whisk together the melted butter, vegetable oil and sugar.  Mix in the eggs then the vanilla extract followed by the sour cream. Fold in the flour then pour half the batter into another bowl. 
    • Mash the banana with a fork then add it to one of the bowls and fold it into the batter. To the other bowl, add the cocoa powder and mix until smooth. 
    • Add a dollop of vanilla batter to the loaf pan then add some chocolate batter. Place the batter randomly in the tin to create a marble effect. Repeat this process alternating between both batters until all the batter is used. Bake the loaf in the centre of the oven for 60 minutes.  The time may vary so check every 5 minutes once it has baked for 50 minutes.
    • Remove the loaf from the oven and allow to cool in the tin for 40 minutes then remove the loaf cake from the pan and place directly on the wire rack to completely cool before slicing. 

    More Chocolate

    • Chocolate Caramel Rice Krispie Treats
    • chocolate chip cookies
      Salted Chocolate Chip Cookies
    • Chunky Mini Egg Cookies
      Chunky Mini Egg Cookies
    • Chocolate Oat Bars
      Chocolate Chip Oat Bars

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    Hi I’m Andrea and I am the writer and food photographer behind Andrea’s Dainty Kitchen. I share a selection of recipes and provide step by step instructions to help readers get the best results from their time in the kitchen.

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