Low Carb & Sugar Free Black Magic Chocolate Torte


Low Carb & Sugar Free Black Magic Chocolate Torte is simply amazing. Just 1.4g net carbs per slice of pure magic dreaminess.

This keto dessert is my rendition of the famous Magic Cake which, in its classic version, is vanilla flavoured. I’m sure you’ve seen it before. Unfortunately, I can’t give credit to anyone, as it has been impossible to find who first made it. If you know, please drop me a comment and I’ll follow it up.

The cake appears to be magic because you obtain three different layers out of the same cake batter. You just pour it into a cake mould and you end up with a top layer similar to a very light sponge cake, a middle layer that has the texture of thick custard, and a bottom layer that’s a bit like a pudding, kind of a blancmange or budino.

The magic happens by adding ingredients at different temperatures, in a specific sequence. Allegedly. I don’t know how much of that is really true, because I’ve always followed the recipe with precision – just to avoid risking a flop. And it always turned out beautifully, exactly as described.

Low Carb & Sugar Free Black Magic Chocolate Torte

Sadly, after my keto re-birth, Magic Cake was left in memory lane, because its key ingredients – wheat flour and cow’s milk – are not keto-appropriate. However, while recently browsing through my old recipe collection, in search for something to ketofy, I saw it, and set myself a new challenge.

Several test runs and three successful bakes later, and I can safely say that Low Carb & Sugar Free Black Magic Chocolate Torte is a winner.

Low Carb & Sugar Free Black Magic Chocolate Torte

This is clearly a chocolate version of ‘Magic Cake’. When I tried to ketofy the vanilla original, the result was too wet and the vanilla flavour just wasn’t coming through enough for me. Eventually, I became tired of wasting so much of my time (and costly ingredients) trying various keto-friendly flour combinations.Low Carb & Sugar Free Black Magic Chocolate Torte

So I had a light-bulb moment and gave the chocolate option a go. One of my better ideas, I must say. Using cocoa powder and lupin flour made all the difference. So good. And so close to the original Magic Cake.

Allergy note: lupin is a legume from the same family as peanuts and soybeans.

The bottom layer isn’t discernible, to be entirely honest, but this could be because I’ve been baking it using a silicone mould. Perhaps a baking tin would allow the bottom layer to develop more. I’ll definitely try that and report back. For now, though, I’ll continue to use my silicone mould, because it’s the only one I have that’s the exact size that must be used.Low Carb & Sugar Free Black Magic Chocolate Torte

Oh yes. Just like with the original Magic Cake, it is IMPERATIVE that you follow my recipe to the letter. You MUST add each ingredient in the order given and at the right temperature. You MUST pre-heat the oven, and the baking mould MUST be the correct size.Low Carb & Sugar Free Black Magic Chocolate Torte

Follow the recipe in religious fashion and I guarantee that you’ll be in for a very, very pleasant surprise indeed.


  • Yield: 16 squares
  • Serving: 1 square
  • Calories: 144
  • Fat: 12g
  • Net Carbs: 1.4g
  • Protein: 5g
Recipe type: Desserts
Cuisine: Ketogenic. Low Carb. Sugar Free. LCHF. Grain Free. Gluten Free.
Prep time: 
Cook time: 
Total time: 
This is 'Magic Cake' revisited and ketofied. With an amazing texture and an incredible flavour, this is a serious torte, for a serious dessert connoisseur.
  1. melt butter and set aside.
  2. separate eggs, then whip egg yolks with stevia, erythritol and water, until pale and fluffy.
  3. add salt, vanilla and warm butter, whisk again until smooth, then sift and add dry ingredients.
  4. warm up milk until hot to the touch (not scalding) and incorporate it slowly, while whisking constantly, to avoid lumps.
  5. pre-heat oven to 150C static.
  6. whip egg whites until opaque, then add vinegar and continue to whip until firm, but not powder-dry.
  7. carefully fold whipped egg whites into the cake mixture, using a manual balloon whisk in a down-across-up-and-over action; this is crucial as you don't want to deflate the mixture.
  8. pour into a rectangular silicone cake mould, at least 5cm deep, measuring 20cm x 10cm (17cm x 7cm at base).
  9. bake for 1 hour and 20 minutes.
  10. remove from oven (it will be wobbly) and let cool.
  11. refrigerate overnight, then remove from mould and cut into 16 slices.
  12. dust with a little icing sugar (U.S. alternative HERE) if desired, and serve.
  13. keep refrigerated, uncovered, for up to 5 days.
If using a baking TIN or Pyrex, it will need to be buttered, lined with parchment paper and buttered again before you pour the cake mixture into it. Do make sure you use same-size bakeware, otherwise the result will be affected.

The layers will develop only if you follow the recipe PRECISELY.

Metric kitchen scales are an inexpensive yet invaluable gadget to ensure accurate measurement of ingredients. Store them upright in a cupboard or over your worktop and they'll only take up a tiny bit of space. Click HERE for the ones I use. For U.S. option click HERE.


Your feedback matters to me! Please leave a comment below. If you try this recipe, you can make my day by sharing a photo on social media with the hashtag #queenketo. Thank you! 🙂


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Average rating 4.6 / 5. Votes: 9


  1. I hate to ask this, but is there a sub for the Lupin flour? I already have Flax, Oat fiber, Almond flour, Coconut flour and protein powder. I also have the THM baking blend and briana Thomas’ baking blend. I can’t see buying another flour 🙂

    • Hi, sorry for the late reply – I’m actually on safari in South Africa with only sporadic access to internet. I did try different flours, and only lupin flour yielded the right result. You could sub with extra-fine almond flour, although I can tell you that you probably won’t get the 3 layers to form correctly. I’ve never sampled the baking blends you mention, as they’re not available in Europe.

  2. This was so yummy! Made it for my sons birthday Thank you Antya!

  3. mmm I made this as a birthday cake Friday and served it saturday w/ banana flavored whipped cream! It is magical !

  4. Karen Ellington

    Just ordered my ingredients and will bake this for Christmas. Thanks Antya xxx

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