Sugar-free sweet potato cake

Sugar-free sweet potato & walnut cake

It’s been a while since I’ve posted a recipe. I seem to go through phases of deep emotional sugar-related thoughts to a flurry of recipes and then back to the deep stuff. If you like or liked your cake (like me), then this recipe is for you.

This sugar-free sweet potato & walnut cake is quite simply awesome. It’s completely sugar-free. That means it has NO sugar substitutes in it. No dates, no coconut sugar, no stevia, nada. It’s naturally sweetened with the sweet potato and dessicated coconut which are both low fructose. It hits my cake texture craving spot perfectly.

Sugar-free sweet potato cake

As ‘sugar-free’ starts to go mainstream, I predict you’ll see the ‘sugar-free’ label a lot. You need to watch out because it’s being used all over the shop for things I wouldn’t really consider truly ‘sugar-free’. Just keep your wits about you on this one.

Anyway here’s the recipe…

Sugar-free sweet potato & walnut cake

Sugar-free sweet potato cake

Makes about 10 portions


  • 1 medium sweet potato
  • 1 ½ cups of flour (I used rye flour)
  • 2 eggs (beaten)
  • 3 tbls coconut oil (could try replacing this with melted butter if you wish)
  • 4 tbls milk
  • ¾ cup unsweetened desiccated coconut
  • ½ cup walnut pieces
  • ½ tsp baking powder
  • ½ tsp bicarbonate of soda
  • ½ tsp cinnamon
  • pinch of salt


  • Preheat oven to 180C and grease an 18 cm round cake tin or a loaf tin.
  • If the coconut oil is solid, stick it in a little ramekin and place in the oven for a few minutes to melt it.
  • Cook your sweet potato. I tend to put mine whole in the microwave for about 6-7 minutes until very soft and cooked through. Peel, and then roughly chop/semi mash.
  • Place the flour, walnuts, baking powder, bicarb, salt, dessicated coconut, and cinnamon in a large mixing bowl. Stir to combine.
  • Whisk the eggs, milk & melted coconut oil together in a smaller bowl
  • Pour these wet ingredients into the larger bowl containing the dry ingredients. Fold the ingredients through (It can get a bit tough and seem like there’s not enough liquid but bear with it.)
  • Mash in the sweet potato until really well combined with the mixture (this takes a bit of elbow grease).
  • Place mixture into the prepared tin and push down with a wooden spoon.
  • Bake in the oven for about 45-50 minutes then let cool.

Sugar-free sweet potato cake

What to do with your cake?

  • Have a slice as a snack with a cup of tea in the afternoon.
  • Have a slice as a quick grab and go breakfast (much better than a shop bought muffin or those breakfast biscuit things)
  • Cut into portions, wrap in cling film and freeze. You can defrost them instantly in the microwave in 60 seconds…voila!

Now this recipe isn’t gluten free I know. If gluten is an issue for you, you could make it gluten free by using buckwheat or quinoa flour. You could also make it dairy free by using almond milk. But note, I haven’t tried this recipe with either of these options so you’ll be experimenting. Let me know how it goes!

What do you think about ‘sugar-free’ cakes and bakes? Have you found ‘sugar-free’ recipes that you don’t really think qualify? Do you get ‘cake’ texture cravings like me? Have you tried cooking this and if so how did it turn out?

Time to change around sugar?

Love this recipe but feel like you are not sure where to start with recalibrating your tastebuds, dealing with emotional eating, changing habits etc? Then check out my free 4-video training course which describes my four pillars to embrace a low sugar lifestyle and sends you LOADS of other helpful resources to get started.


19 replies
  1. Kate
    Kate says:

    I’d really like to make this soon! I’ve been using My Fitness Pal to work out how much sugar is in homemade things, as it’s so difficult to do otherwise! Anyway, this looks absolutely fantastic for sugar and calories and fibre etc. I thought I’d post the nutritional information here for this recipe, in case anyone was interested. Thanks Laura 🙂

    Amount Per Serving (10 servings)
    Calories 176

    Total Fat 11 g (17 %)
    Total Carbohydrate 16 g (5 %)
    Dietary Fiber 3 g (13 %)
    Sugars 1 g

    • Laura
      Laura says:

      Wow amazing Kate! Thanks you so much for posting the info, how did you work that out? Did you use fitness pal to do it?
      Laura xx

      • Kate
        Kate says:

        Hi Laura,

        Yeah it was from fitness pal! Just made the cake this evening and I really love it 🙂 has a little bit of sweetness, and a really lovely texture that definitely satisfies the craving for cake-y food like you said!

        Thanks for the recipe 🙂 x

        • Laura
          Laura says:

          I know, I have to say, this is the recipe that I cook the most often myself! I freeze it in portions and then defrost/reheat in the microwave when I have a cake-ish craving. This sometimes happens when I’ve indulged in a bit too much wine the night before! Anyway thanks for the comments 🙂 x

  2. Nick E
    Nick E says:

    Hi Laura, we’ve got this <a href=""charity cake sale coming up at work for #GivingTuesday and I want to try this recipe!

    You know what my kitchen is like and my cooking skills are non-existent, so I’ll let you know if it’s a success! I may be cheeky and add a couple of chips of dark chocolate into the mix, however… (and do you think it would work with small bits of bacon in?!!!)

    Catch you soon!

    • Laura
      Laura says:

      Hey Nick, it’s a ‘sweetish’ tasting cake so I’d say put some chocolate chips in if it’s for a wider audience and see how you go as they will probably like it more sweet. I’d say maybe try this savoury bake recipe instead and you could put bacon in it quite happily If you don’t have the ground almonds, just use flour instead for that part. I think they’ll really appreciate something savoury at a cake sale. Let us know how you go! x

  3. Julia
    Julia says:

    Just made this for my family, was convinced my 5 year old wouldn’t like it as he claims to hate sweet potato but he’s just asked for a 2nd portion. Had I told him it has sweet potato in it he probably wouldn’t have touched it, it’s great you can give them a treat of “cake” without the sugar; lovely recipe!

    • Laura
      Laura says:

      Hi Julia, this is amazing! I’m sooo glad your son liked it, that is a success! I made this recipe just at the weekend. It really hits my cake spot whenever I fancy it. So glad that you tried it and have found it works for you 🙂 Laura x

  4. Heather
    Heather says:

    I made this today and was pleasantly surprised how good it was. I have never made a cake with sweet potato but it was a good texture with a lovely hint of nuts and spice. I used a mix of plain flour and spelt flour which seemed to work well, I may try all spelt flour next time. This cake is great on its own but I also like it with a dollop of plain Greek yogurt on the side, yum!

    • Laura
      Laura says:

      Hi Tirtza, I’m not really sure. Try giving a go but I can’t guarantee what it will turn out like I’m afraid with that one as the oil adds fat rather than sweetness.


Trackbacks & Pingbacks

  1. […] am now stalking her site for fab new ideas for sugar free recipes. I was not let down. I tried her sugar free sweet potato and walnut cake and after changing a few ingredients based on what I had, was extremely pleased with what I got. […]

  2. […] sweet potato cake: . Because for the first six months, all you want is a bit of STODGY CAKEY TEXTURENESS, even if it […]

  3. […] inspired by a recipe on Happy Sugar Habits, I tweaked this a bit to fit with my diet and what I had in the […]

  4. […] am now stalking her site for fab new ideas for sugar free recipes. I was not let down. I tried her sugar free sweet potato and walnut cake and after changing a few ingredients based on what I had, was extremely pleased with what I got. […]

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