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    Home » Recipes » Slow Cooker Desserts

    Slow Cooker Blackberry and Apple Cake

    image of Lucy's face
    Modified: Sep 21, 2025 · Published: Sep 21, 2018 by bakingqueen74 · This post may contain affiliate links · 1 Comment
    1366 shares
    Jump to Recipe

    Mellow autumn has arrived with all the delicious apples and blackberries that have now finished ripening and so now clamour to be used in the kitchen. What better than to bake a blackberry and apple cake to make the most of them, and to make a bit of a change from a blackberry and apple crumble or pie, those autumnal favourites.

    Close up of cake topped with blackberry and apple, cake cut.

    This blackberry and apple cake was baked in my slow cooker but could of course also be baked the usual way in the oven if you wanted to.

    Jump to:
    • Ingredients
    • Method
    • Why Bake a Cake in a Slow Cooker?
    • Recipe
    • Reviews

    But when you can get such good results, I think you should try making a slow cooker cake at least once!

    Close up of cake topped with blackberry and apple.

    This is an upside-down style cake, where the fruit cooks and caramelises in the base of the slow cooker pot under the cake as it bakes.

    This type of cake is so fun to bake, I have a summery berry version of this cake too.

    Cake topped with blackberry and apple, with blackberries next to it.

    The blackberries stain the apple with their wonderful purple juice as they soften during cooking. I just love that colour!

    The cooking apples are macerated by sprinkling them with sugar before cooking, which draws the liquid out of the apples and stops them being so tart.

    This makes your crockpot apple cake so sweet!

    Cake topped with blackberry and apple, with blackberries next to it.

    Bite through the layer of soft sweet and tangy fruit to the soft sponge cake below.

    It’s more like a dessert than a cake and is amazing covered in custard too!

    Ingredients

    Here’s what you will need to make this slow cooker blackberry cake. Get the exact quantities from the recipe card further down.

    • Bramley (cooking) apples
    • caster sugar
    • butter
    • blackberries
    • self-raising flour
    • eggs
    • baking powder
    Cake topped with blackberry and apple, with blackberries next to it.

    Method

    1. Prepare the cooking apple and mix with 25 g of caster sugar in a bowl. Leave for five minutes or so to absorb the sugar (it will draw some juice out too).
    2. Mix together the soft butter and second 25 g of caster sugar to form a soft paste. Spread this over the bottom of the slow cooker pot. This will allow the fruit to caramelise in the pot so make sure you spread it evenly and cover the whole base of the pot.
    3. Place the prepared apple and blackberries in the base of the slow cooker pot.
    4. Put all of the cake ingredients in a large bowl and mix either with a wooden spoon or handheld mixer until well combined. 
    5. Spoon the cake mixture on top of the apple and blackberries and smooth it over so it goes right to the edges.
    6. Replace the slow cooker lid, with a tea towel added under the lid to stop condensation from dripping onto the top of the cake.
    7. Bake on high for 1.5 to 2 hours or until a skewer or knife comes out of the centre clean.
      Look out for burning round the edges, if it does, take the pot out and turn it around or turn the slow cooker to low.
    8. Once cooked through, remove the pot from the slow cooker, allow to cool slightly, then run a knife around the cake, turn the pot over, and carefully catch the cake on your hand. 
      Be careful when doing this so the cake doesn’t break apart, especially if it is still warm. If needed, let it cool for a bit longer.
    9. Transfer to a plate, slice and serve!

    Why Bake a Cake in a Slow Cooker?

    You might well think, why would you make a cake in a slow cooker? I find it a good way to make cakes that costs less than running an oven and has less risk of burning.

    You still need to check your cake regularly and look out for burning but if it does happen it won’t just take minutes.

    This cake is not too deep so it can safely cook directly in the bottom of the slow cooker pot as it will cook through to the centre without burning around the edges. (Deeper cakes I would put in a silicone pan!)

    The fruit layer also protects the bottom of the cake from burning.

    Check out my post all about baking in a slow cooker (with loads more slow cooker cakes and dessert recipes too!) and get lots of tips in my post on how to make a cake in a slow cooker!

    Cake topped with blackberry and apple, with blackberries next to it.

    Recipe

    A cake topped with apple and blackberries on a wooden board.

    Slow Cooker Blackberry and Apple Cake

    By Lucy Allen | BakingQueen74
    An upside down cake with blackberry and apple to make to celebrate autumn fruit
    5 from 5 votes
    Prep Time: 20 minutes minutes
    Cook Time: 2 hours hours
    Total Time: 2 hours hours 20 minutes minutes
    Servings: 8
    Course: Baking
    Cuisine: Slow Cooker
    Calories: 271kcal
    Rate Save Saved! Pin Print

    Ingredients

    For the fruit layer:

    • 1 large Bramley (cooking) apple (approx 275 g) cored and peeled and sliced
    • 25 g (2 tbsp) caster sugar (superfine sugar)
    • 30 g (2 tbsp) butter at room temperature
    • 25 g (2 tbsp) caster sugar (superfine sugar)
    • 175 g (1 ¼ cups) blackberries

    For the sponge layer:

    • 100 g (½ cup) caster sugar (superfine sugar)
    • 100 g (½ cup + 2 tbsp) self-raising flour
    • 100 g (¼ cup + 3 tbsp) butter
    • 2 medium free-range eggs
    • 1 tsp baking powder

    Equipment

    round slow cooker
    round slow cooker
    mixing bowl
    mixing bowl
    weighing scales
    weighing scales

    Instructions
     

    • Prepare the cooking apple and mix with 25 g of caster sugar in a bowl. Leave for five minutes or so to absorb the sugar (it will draw some juice out too).
      1 large Bramley (cooking) apple (approx 275 g), 25 g caster sugar (superfine sugar)
    • Mix together the soft butter and second 25 g of caster sugar to form a soft paste. Spread this over the bottom of the slow cooker pot. This will allow the fruit to caramelise in the pot so make sure you spread it evenly and cover the whole base of the pot.
      30 g butter, 25 g caster sugar (superfine sugar)
    • Place the prepared apple and blackberries in the base of the slow cooker pot.
      175 g blackberries, 1 large Bramley (cooking) apple (approx 275 g)
    • Put all of the cake ingredients in a large bowl and mix either with a wooden spoon or handheld mixer until well combined. 
      100 g caster sugar (superfine sugar), 100 g self-raising flour, 100 g butter, 2 medium free-range eggs, 1 tsp baking powder
    • Spoon the cake mixture on top of the apple and blackberries and smooth it over so it goes right to the edges.
    • Replace the slow cooker lid, with a tea towel added under the lid to stop condensation from dripping onto the top of the cake.
    • Bake on high for 1.5 to 2 hours or until a skewer or knife comes out of the centre clean.
      Look out for burning round the edges, if it does, take the pot out and turn it around or turn the slow cooker to low.
    • Once cooked through, remove the pot from the slow cooker, allow to cool slightly, then run a knife around the cake, turn the pot over, and carefully catch the cake on your hand. 
      Be careful when doing this so the cake doesn’t break apart, especially if it is still warm. If needed, let it cool for a bit longer.
    • Transfer to a plate, slice and serve!

    Notes

    I made this recipe in an oval 3.5 litre slow cooker.
    Times will vary depending on your slow cooker and its size.
    Look out for burning and take steps if you do see it is burning. Check the cake regularly.
    Have you made this recipe?Please leave a star rating and comment below to let me know how you got on!

    More Slow Cooker Desserts

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      Slow Cooker Lemon Drizzle Cake
    • Syrup sponge on a white plate, custard and golden syrup behind.
      Slow Cooker Syrup Sponge
    • A baked bread and butter pudding in a slow cooker pot.
      Slow Cooker Bread and Butter Pudding
    • Blackberry crumble in a black slow cooker pot.
      Slow Cooker Blackberry Crumble

    Reader Interactions

    Comments

    1. Carrie Larwood says

      September 21, 2018 at 1:07 pm

      Looks yummy!

      Reply
    5 from 5 votes (5 ratings without comment)

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    Hi, I'm Lucy! I'm a slow cooker addict, food blogger and also a busy working mum of two. I hope you'll enjoy the recipes I create and post which are perfect for busy families.

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