Best Ever - Low Syn Banana Bread - Slimming World - Recipe - Cake

Growing up I was never much of a fan of cake, I even used to opt for a Baked Alaska instead of birthday cake every year, but there was always one kind of cake that I totally adored… banana bread! Nowadays I enjoy most cakes but banana bread still has a special place in my heart, especially as it was the first cake I ever remember making on my own. However, when you’re trying to be healthy and stick to the Slimming World plan, banana bread can seem like a million miles away! That’s why I’ve come up with this Best Ever Low Syn Banana Bread recipe, to keep syns low whilst keeping hold of everything that I love most about banana bread.

Best Ever - Low Syn Banana Bread - Slimming World - Recipe - Cake

A Proper Cake for Tea Time

When I first started Slimming World, what feels like a million years ago now, I tried out a lot of the traditional Slimming World cake recipes. Most of these seemed to consist 90% of whisked egg white and very little flavour, and frankly, I was never a fan. For me, if you’re going to bother using some of your syns on a tasty cake, it really should be cake! Whisked egg whites have their place in baking, but a real cake needs more ingredients to make it worth eating! 

Best Ever - Low Syn Banana Bread - Slimming World - Recipe - Cake

This Low Syn Banana Bread is, therefore, not one a recipe that includes 12 eggs and nothing else, it’s a proper bake which has been carefully balanced to create a low syn option to enjoy totally on plan. It’s perfect with a cup of tea with friends, or even to enjoy as a quick on the go breakfast! I like to spread a little bit of strawberry jam on mine if I’m on the go for an extra sweet boost, but it’s really up to you! It’s a delicious recipe all on its own, with a super moist texture, that doesn’t compromise on texture, flavour or quality and won’t hurt your waistline when eaten in moderation. 

Best Ever - Low Syn Banana Bread - Slimming World - Recipe - Cake Best Ever - Low Syn Banana Bread - Slimming World - Recipe - Cake

Slimming World Friendly Low Syn Banana Bread

As I’ve said, this is a recipe that can fit perfectly into your Slimming World plan. For just 2.5 syns per slice, you can enjoy this Low Syn Banana Bread without feeling guilty at all. It’s proof that Slimming World baking doesn’t have to be boring, and that baking, in general, doesn’t have to be unhealthy! The syn breakdown for this recipe is as follows: 

140g Self Raising Flour = 22.5 syns

1/2tsp Baking Soda = 1/2 syn

2x Ripe Mashed Bananas (roughly 200g) = 8 syns

28g Dried Raisins = 4 syns 

2tbsp Sukrin 1 Sweetener = 1 syn 

To save you doing the maths, that equals 36 syns in total for the whole loaf. I got 15 slices out of this Low Syn Banana Bread when using a 30cm Loaf Tin (like these ones) to bake it. 36 divided by 15 works out at 2.4 syns per slice, which you would round up to 2.5 syns per slice to be on the safe side with your syn count. If you ask me, a tiny 2.5 syns for a slice of cake is not half bad! Of course, if you decide to cut thicker slices and get fewer from the loaf as a whole, make sure to adjust your calculations by dividing 36 by however many slices you have cut. 


You can buy Sukrin:1 on Amazon here.

I’ve used Sukrin:1 Sweetener in this recipe. It’s my favourite granulated sweetener as it can be substituted 1:1 when replacing regular sugar. This means you don’t have to adjust your recipes and try and guess how much sweetener to use. If you are using other powdered sweeteners you will need to adjust the recipe accordingly as they can be much sweeter than normal sugar and you may need to use less. 

Best Ever - Low Syn Banana Bread - Slimming World - Recipe - Cake

I love seeing when people make my recipes! So if you do whip up a batch of this Low Syn Banana Bread you can email it to me or share it on Facebook and Instagram tagging @basementbakehouse on Facebook or @basementbakehouse_sw on Instagram! You can also share it in my Facebook group too, you can join here if you haven’t already.

Best Ever - Low Syn Banana Bread - Slimming World - Recipe - Cake

Making Best Ever Low Syn Banana Bread 

I really hope you love this Low Syn Banana Bread recipe as much as I do. It’s really simple and quick to make and really hits the spot when you’re craving a cake fix. My favourite thing about creating healthy bakes like this is that they give you the freedom to have fun in the kitchen without worrying about the impact it might be having on your health. A recipe like this is the perfect marriage between healthy and happy, so I look forward to seeing yours! 

Yields 15

Serves 15

Best Ever Low Syn Banana Bread

A simple, delicious and low syn banana bread recipe.

5 minPrep Time

25 minCook Time

30 minTotal Time

Save RecipeSave Recipe

5 based on 4 review(s)


  • 140g Self Raising Flour - 22.5 syns
  • 1.2tsp Baking Soda - 1/2 syn
  • 2x Bananas (roughly 200g) - 8 syns
  • 3x Eggs
  • 2tsp Sweet Cinnamon
  • 28g Dried Raisins - 4 syns
  • 2tbsp Surkin:1 Sweetener - 1 syn
  • 1tsp Vanilla Essence


  1. Preheat your oven to 180 degrees.
  2. In a mixing bowl, combine the flour, baking soda, sweetener and cinnamon.
  3. In a separate bowl, mash the bananas with a fork until they are almost smooth. I like a few lumps through my banana bread but you can mash to your desired consistency.
  4. Whisk the eggs and vanilla essence in with the banana and then add to the flour mixture.
  5. Whisk until smooth and then stir in the raisins.
  6. Add to a loaf tin lined with baking parchment and bake for 25 minutes, or until a skewer comes out clean when inserted into the deepest part of the loaf. You may need to cover the top with tinfoil for the last 5 minutes to prevent the top burning, so check after 20 minutes.


2.5 syns per serving when sliced into 15 pieces. 36 syns in total. Adjust syn value per slice according to the number of servings you have cut. Syn values correct at time of writing. Please do not screenshot this recipe. Copyright for the words and images is owned by Basement Bakehouse.



This LOW SYN BANANA BREAD recipe is the ultimate Slimming World cake recipe! Just 2.5 syns per slice, it's an ideal Slimming World dessert, treat or breakfast.

Cook Blog Share


  • Lauren Vavala | DeliciousLittleBites

    06/11/2018 at 6:27 pm

    I haven't heard of Slimming World before, but can tell from the recipe and the pictures that this is one moist, healthier option banana bread! Great recipe!
  • Shanika

    06/11/2018 at 8:55 pm

    This Banana Bread looks amazing! Super moist and tender! Before this, I never heard of the Slimming World Diet, but it sounds very interesting.
  • ali randall

    06/11/2018 at 9:29 pm

    This banana bread looks wonderful and I love that it is healthy and a great option when watching what I eat.
  • Ben Myhre

    06/11/2018 at 9:40 pm

    No matter what diet this is a part of, it looks great! If it tastes awesome and still helps me watch my waistline, sign me up!
  • Emily Meyer

    06/11/2018 at 9:42 pm

    The texture of this bread looks perfect! I can't wait to try it out!
  • Katherine Hackworthy

    07/11/2018 at 11:20 am

    Banana bread is so tasty, lovely and moist, quite dense and delicious flavour. Brilliant to make a low syn version, and certainly much more appetizing than the recipes with loads of egg whites.
  • Jacqui Bellefontaine

    07/11/2018 at 11:28 am

    I don't do slimming world although perhaps I should. I would definitely like to try this banana bread it looks delicious and has a fabulous texture. Thank you for linking to #CookBlogShare
  • Bintu | Recipes From A Pantry

    07/11/2018 at 11:57 am

    Ooh I love banana bread and this looks perfect! I love a guilt free treat like this!
  • Danielle Wolter

    07/11/2018 at 12:11 pm

    Loving this healthier version of banana bread. It's great that we can eat delicious food while still being healthy :-)
  • Mary Bostow

    07/11/2018 at 1:30 pm

    This bread looks sooooo good! Yummy! This made me drool. I want to eat it every day! I'm sure this is very tasty. This is a great recipe for me.
  • Jacqueline Meldrum

    08/11/2018 at 11:52 am

    Simple but delicious. I love that you added cinnamon too. Sharing this for you.
    1. Cliona

      08/11/2018 at 12:38 pm

      Thank you Jacqueline!
  • Kelly Anthony

    08/11/2018 at 12:34 pm

    Loving this healthier take on traditional banana bread. Banana bread is loved by all at our house and I like how this recipe is better for you than most.
  • Lisa Huff

    08/11/2018 at 1:02 pm

    Wow, looks so light and fluffy! I bet it tastes fabulous toasted too!
  • Catherine Arena

    10/01/2019 at 11:29 am

    Love banana bread esp with a good cup of coffee! Ive never made banana bread with raisins but feel I now need to give this a try for sure! Thanks for the inspiration!
  • Elaine Smith

    09/12/2019 at 4:28 pm

    Hi, I searched the net for a good low syn banana loaf as I am getting fed up with Weetabix cake and don't like other eggy recipes. Found this one and made my first one ever today. A really easy recipe and wow it's good! It's a small loaf but cut into 12 and stunned accordingly, is just what you need with a cup of tea. Many thanks x
    1. Cliona

      10/12/2019 at 8:46 pm

      I'm so glad to hear this! Thank you so much for your comment.
  • Mairead

    01/04/2020 at 12:22 am

    I love that you added raisins to this banana bread. I think they're a perfect addition to this tasty looking recipe. Many thanks.
  • Jill Ratcliffe

    05/05/2020 at 3:18 pm

    Just made this and oh my - absolutely DELIIOUS!! I've been a target member of SW since February 2020 and have been looking for some REAL cake for a long time. This will most definitely be in my repertoire now!! CAN IT BE FROZEN, PLEASE?
    1. Cliona

      31/05/2020 at 10:06 am

      Hi Jill! That is so kind of you, I'm so glad you enjoyed it! I think it could be frozen with no issues, but I haven't tried it myself :)
  • Sarah

    07/11/2020 at 10:55 am

    Looks lovely! I just wondered why you counted banana as 8 syns - I thought they were free? X
    1. Cliona

      24/11/2020 at 12:24 pm

      Hi Sarah, the banana is mashed which according to Slimming World's rules means it should be synned. May choose not to do this but I have included those syns just so that everyone can make the decision. If you choose not to syn then this recipe will be even lower syns!

Leave a comment

Your email address will not be published. Required fields are marked *

Rate this recipe:

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Previous Post Next Post