Make your own Keto Mars protein bar. No sugar added and only 2g net carbs per serve. Honestly, you will think you are eating the real thing.
mars bars on green plate
Mad Creations Keto Mars Bar #ketochocolate #ketodessert #ketodiet

The Ingredients

There are a couple of specialty ingredients you will have to buy to make this recipe work. Those are Whey Protein Isolate and Sukrin Syrups (US alternatives also include are Allulose Syrup or Vitafiber).

Whey Protein Isolate – I use Isopure WPI as it has a neutral flavour, no carbs and works perfectly in each of my recipes. Substitute a pea protein isolate for dairy-free Mars protein bar or another WPI brand of choice.

Sukrin Syrups Sukrin Australia is the only retailer of Sukrin products. The syrups, both in clear and gold, are a great substitute for honey or glucose syrup and maple syrup or golden syrup.

Vitawerx Milk Chocolate is absolutely delicious! Available in both milk chocolate and white chocolate it is as close as you can get to eating the real thing but with ZERO sugar.

mars bars on green plate

More Recipes To Try

For more keto sweets recipes here are just a few of my favourites. I might just have a “thing” for keto candy recipes after all.

  1. White Chocolate Snickers
  2. Vanilla Nougat Bar
  3. Butter Caramel Nougat Bar
  4. Cinnamon and Walnut Nougat Bar
  5. Mint Slice Biscuits
Mad Creations Keto Mars Bar #ketochocolate #ketodessert #ketodiet

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Sugar free Mars Bar on white plate on green background

Keto Mars Protein Bar

Make your own Keto Mars protein bar. No sugar added and only 2g net carbs per serve. Honestly, you will think you are eating the real thing.
4.98 from 69 votes!
Prep Time: 15 minutes
Cook Time: 25 minutes
Total Time: 40 minutes
Course: Keto Chocolate
Cuisine: Australian Keto
Diet: Diabetic
Recipe Category: Low Carb
Calories: 107kcal
Author: Megan Ellam
Servings: 32 serves
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Chocolate Nougat


  • 200 g (1 cups) Caramel Fibre Syrup
  • 60 g (2 oz) butter
  • 80 g (0.3 cups) thickened cream


I used a silicone bar mould that is now discontinued. A silicone large icecube tray would be perfect for 32 x 4cm mars bites.



  • Place the syrup and chocolate into a large heat-safe bowl and microwave for 1 minute. Stir to combine and melt chocolate.
  • Combine chocolate mix with WPI and MCT oil and mix until combined. With a gloved hand massage mix until it is no longer grainy.
  • Spoon or break off pieces and push into moulds (will make 32 x 4cm moulds). Set aside.


  • Place all caramel ingredients into a large heat-safe bowl. Heat on high for 3 minutes. Carefully remove from microwave stir mixture and return to microwave. Continue to heat at 1-2 minute intervals until mixture looks very bubbly when you take out and when stir becomes thicker and more viscose. At this point, you will definitely smell a caramel scent.
  • Carefully spoon the hot caramel into your moulds. Refrigerate until set.
  • Melt chocolate and thinly coat each mars bar.


1. Any keto syrup sweetener used must have the main ingredients as a syrup (non-GMO corn or tapioca syrup). Allulose syrup is also a good alternative. There are some low carb syrups on the market that have the first ingredient listed under ingredients as water. Those products are not suited to this recipe.
2. Chocolate, for the Milk Chocolate you can use any of the following zero sugar varieties, Vitawerx, or Well Naturally. Each of these brands offers a low carbohydrate, no sugar at all, and low-calorie option.
3. The bars are best stored in an airtight container in a cool dry place. If refrigerated you will find that they are a lot harder, just like the real thing if stored in a fridge or freezer.
4. All keto sweets should be a sometime food. This recipe could easily be made into smaller portions or drops similar to a Rolo.
5. Please use caution when making the caramel. The instructions for the microwave are open in time as many microwaves have different wattage. In mine at 750W I find the caramel takes around 8-10 minutes. As it starts to get a little thicker you will notice if you check your spoon after 30 seconds you can gauge what “ball” or setting stage your caramel is at. For your convenience, I have included a video to show you the look and feel the caramel has when it is ready to pour.

Your Own Notes


Serving: 1serve | Calories: 107kcal | Carbohydrates: 1g | Protein: 3g | Fat: 4g | Saturated Fat: 3g | Polyunsaturated Fat: 0.1g | Monounsaturated Fat: 1g | Trans Fat: 0.1g | Cholesterol: 7mg | Sodium: 15mg | Potassium: 3mg | Sugar: 0.1g | Vitamin A: 84IU | Vitamin C: 0.01mg | Calcium: 2mg | Iron: 0.003mg | Magnesium: 0.2mg | Net Carbs: 1g
Tried this recipe?Mention @meganellam or tag #madcreations!

Megan Ellam is an Australian keto recipes blogger and author of amazing keto cookbooks such as Slow Cook KetoKeto LocoThe Healthy Family Keto Cookbook and Every Day Keto.

Megan has been following a ketogenic diet since being diagnosed with insulin resistance in early 2017.

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42 responses to “Keto Mars Protein Bar”

  1. Janiece

    3 stars
    I have just made these. Although the flavour is perfect I found the nougat so very sticky. I used gloves but ended up not being able to get the nougat off of the gloves so used my hands. Same thing. I must be doing something wrong as I didn’t even get 1/2 of the bites. Most went in the bin glued to the gloves or stuck in the bowl😩🤷‍♀️
    I did the caramel and as I had a lot left I made chocolate coated caramel bites. 🤷‍♀️

    1. Megan Mad Creations Hub

      Sounds like a simple fix of more protein powder. It easily dries out the mixture and it should be smooth and not sticky at all.

  2. Lynda

    5 stars
    This is by far my favourite protein bar. I have made it numerous times and everybody loves them. It’s an awesome recipe and very easy to make . Thanks for the reminder to make more delicious mars protein bars.
    If you haven’t tried these yet then definitely give them a go.

    1. Megan Mad Creations Hub

      Yay! Thanks Lynda xx

  3. Heidi J

    Were the Lakanko golden malt and vanilla syrups available when you created this recipe and can they be used instead of Sukrin in your recipes

    1. Megan Mad Creations Hub

      I havent tested them but I know the Lakanto is a lot thinner in consistency so not too sure how it will go.

4.98 from 69 votes (57 ratings without comment)

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