This spooky low-carb cocktail is perfect for Halloween! I used homemade blackberry-lime syrup and substituted the commonly used simple syrup with powdered Erythritol. There are other options you can try:
- Skip the powdered sweetener in the blackberry juice and make your own simple syrup like in this Spicy Low-Carb Margarita. The only drawback of making simple syrup this way is that it may partially crystallise once it's chilled.
- You could use NuNaturals Simple Syrup. Apart from plain simple syrup, it's available in several different flavours such as Ginger Syrup which worked wonderfully in my Keto Ginger & Rhubarb Creamsicles. Just remember to use the recommended amount as too much would make your cocktail way too sweet.
- Lastly, you can just use a few drops of stevia. NuNaturals are my favourite as they don't taste bitter.
Note that this recipe makes about 2 1/4 cups (530 ml/ 18 fl oz) blackberry juice. This will be enough for 6 cocktails. Fibre is counted partially (25%) as most of the pulp and seeds are discarded.
Looking for a spooky treat? Try my Halloween Keto Pizza, Spooky Eyeball Cookies, Cheesy Keto Spinach Crackers, and even more Halloween Keto Recipes.
Serving size cocktail
Allergy information for Low-Carb Black Widow Cocktail
✔ Gluten free
✔ Dairy free
✔ Egg free
✔ Nut free
✔ Nightshade free
✔ Pork free
✔ Avocado free
✔ Coconut free
✔ Fish free
✔ Shellfish free
✔ Beef free
Nutritional values (per serving, cocktail)
Net carbs4.7 grams
Calories from carbs 71%, protein 16%, fat 13%
Total carbs5.7 gramsFiber1 gramsSugars0 gramsSaturated fat0 gramsSodium8 mg(0% RDA)Magnesium17 mg(4% RDA)Potassium135 mg(7% EMR)
Ingredients (makes 1 cocktail)
Homemade blackberry syrup:
- 450 g fresh or frozen blackberries (1 lb)
- 1/4 cup lime or lemon juice (1-2 pieces)
- 1 cup water (240 ml/ 8 fl oz)
- 1/2 cup powdered Erythritol or Swerve (80 g/ 2.8 oz)
- 90 ml homemade blackberry juice (3 fl oz)
- 1/4 cup vodka (60 ml/ 2 fl oz)
- Optional: sparkling water (soda water) to top up
- Optional: acai powder or freeze-dried berry powder mixed with granulated Erythritol, and fresh blackberries for decoration
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