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Sugar-Free Sour Jelly Worms

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These sugar-free lemon & lime Sour Jelly Worms are the most awesome keto Halloween recipe! So much fun to make with the kids and super easy.

These low-carb jellies are also made with grass-fed gelatin, so good for your gut health and you can leave off the sour coating if you prefer. They’re super delicious with or without it.

I chose to keep the lemon and lime separate for different tastes and colour but you can totally mix together if you prefer. I also used two natural food colourings to make the colours pop but again you don’t have to use this. They still turn out nice, just paler. The yellow was a turmeric based food colouring and the green was spirulina with a touch of turmeric (see below).

The sour coating is made from granulated low-carb sweetener (I used Erythritol but you could use monk fruit or Swerve too) and organic Vitamin C powder. Since the sour coating for these low-carb jellies doesn’t contain any preservatives, they need to be eaten pretty much straight away or the coating absorbs into the jellies. It still tastes delicious though, it just doesn’t last too long.

Without the coating these healthy sugar-free gummies store well in the fridge for 3 - 4 days so you could always just make up a speedy batch of coating (takes about 30 seconds) and coat them in it when ready to eat.

Of course, these low-carb jellies don’t need to be made into worms. How about Mad Marching Gummy Bears (see below)? I may have got totally carried away in the Halloween spirit and made these too! Or enjoy at any time of the year and use a silicone mould of your choice. Just have fun with them. Make sure you tag us @ketodiet_app if you make them so we can see all your awesome creations!

Happy Halloween guys!

Hands-on Overall

Serving size jelly

Allergy information for Sugar-Free Sour Jelly Worms

✔  Gluten free
✔  Dairy free
✔  Egg free
✔  Nut free
✔  Nightshade free
✔  Pork free
✔  Avocado free
✔  Coconut free
✔  Fish free
✔  Shellfish free

Nutritional values (per serving, jelly)

Net carbs0.3 grams
Protein0.7 grams
Fat0 grams
Calories4 kcal
Calories from carbs 29%, protein 70%, fat 1%
Total carbs0.3 gramsFiber0 gramsSugars0.1 gramsSaturated fat0 gramsSodium3 mg(0% RDA)Magnesium0 mg(0% RDA)Potassium3 mg(0% EMR)

Ingredients (makes about 40 jelly worms)

Sour sugar coating:


  1. Place the gelatin in a bowl. Add the water and allow to bloom for 10 minutes whilst you squeeze the lemons and limes.
  2. Juice the lemons and limes. Sugar-Free Sour Jelly Worms
  3. Place the lemon juice in one pan and the lime juice in another. Add 1/2 the bloomed gelatin and 1/2 the sweetener to each pan. Heat on a medium flame and whisk until fully melted.
  4. Turn off the heat and add the natural food colouring. Sugar-Free Sour Jelly Worms
  5. Pour the mix into your jelly moulds. I used a pipette to make worms for Halloween but you could use any you like. Place in the fridge for 2 - 3 hours or until fully set. Sugar-Free Sour Jelly Worms
  6. When set, remove the jellies from the moulds. Sugar-Free Sour Jelly Worms
  7. To make the sour coating, mix the granulated sweetener and the powdered citric acid in a bowl. Dip the jellies in the sour mix and eat straight away. It's best to coat these just before serving. As there’s no preservatives in these, after a while the sour coating absorbs into the jellies but they still taste good! Sugar-Free Sour Jelly Worms
  8. Place on a wire wrack and enjoy. Best eating fresh with the coating and without the coating can be stored in the fridge for 3 - 4 days. If you want to add the coating, bring jellies to room temperature to soften slightly before coating them. Sugar-Free Sour Jelly Worms
  9. Apart from works you can use the mixture to make any shapes such as these cute Keto Mad Marching Gummy Bears (will make about 200 pieces)! Aren't they cute?😍 Sugar-Free Sour Jelly Worms

Ingredient nutritional breakdown (per serving, jelly)

Net carbsProteinFatCalories
Gelatin powder, thickening agent, unsweetened
0 g0.7 g0 g3 kcal
Water, still
0 g0 g0 g0 kcal
Lime juice, fresh
0.1 g0 g0 g0 kcal
Lemon juice, fresh
0.1 g0 g0 g0 kcal
Erythritol (natural low-carb sweetener)
0.1 g0 g0 g0 kcal
Natural food dye
0 g0 g0 g0 kcal
Erythritol (natural low-carb sweetener)
0 g0 g0 g0 kcal
Ascorbic Acid (Vitamin C)
0 g0 g0 g0 kcal
Total per serving, jelly
0.3 g0.7 g0 g4 kcal

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Jo Harding
Creator of

Jo Harding

Food is one of life’s most powerful medicines. I’m a true testament that once you find the right approach for you, you can overcome poor health through the healing power of food.

I believe the secret to radiant health starts and ends with a healthy gut so my recipes are all grain, gluten and refined sugar free. Most are also dairy-free.

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Comments (2)

Can’t wait to try