Keto Simple Syrup


5 from 184 votes
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This keto simple syrup is a low carb and sugar free take on the cocktail and beverage addition! Made with just 2 ingredients, it’s perfect for both alcoholic and non-alcoholic drinks! 2 grams net carbs per serving. 

keto simple syrup

Keto Simple Syrup

When it comes to keto beverage condiments, my favorite recipes to make are coffee creamer, condensed milk, and this keto simple syrup. 

When I first became the legal age of drinking, my go-to drink of choice was always cocktails. I never warmed up to hard liquor, beer, or wines, and needed all my drinks to be on the sweeter side.

Since going keto, I was very resistant to give up on my favorite cocktails. I did some deep diving and found that the culprit of adding carbs to them was all the syrups, added sugar, and fruit juices used to spike them. Instead of omitting cocktails altogether, I’ve decided to make my own simple syrup. 

I’ve been meaning to share a keto simple syrup recipe for quite some time. As someone who prefers cocktails over beers, wine, or champagne, this simple syrup has made my drinks MUCH tastier. Now, this syrup is so simple to make, and you’ll add it to more than just cocktails- It’s great in coffee, hot drinks, and smoothies!

No sugar and no thickeners are needed, but you’d never tell. The texture is thin but very slightly thick, perfect to mix into drinks easily. The syrup is pleasantly sweet and a small bit goes a long way! 

I had some friends over for dinner and drinks the other night and used this syrup in all the cocktails and mixers and NO ONE believed me when I told them they were sugar free- They thought it had to be loaded with it!

How do you make keto simple syrup?

The Ingredients

  • Granulated sweetener of choice– I highly recommend allulose, as it dissolves exactly as sugar does. However, if you don’t have any on hand, erythritol or Splenda can also be used. 
  • Water– Room temperature water. 
  • Xanthan gum– Optional, but a dash will thicken the syrup beautifully. 

The Instructions

Start by adding the sweetener and water into a small saucepan and place it over low heat. Stir it gently, while it dissolves, and allow it to heat up until it begins to simmer. If using the xanthan gum, add it here and whisk well, until dissolved. Remove the saucepan from the heat and allow it to cool completely.

Once cool, transfer to a sealable glass or jar. 

sugar free simple syrup

Tips to make the best sugar free simple syrup

  • If you’d prefer a thicker syrup, definitely add the xanthan gum or allow the mixture to simmer for an extra 15 minutes.
  • While any granulated sweetener can be used, allulose is the best keto sweetener, as, unlike others, it dissolves exactly like sugar does, without any grittiness.

Flavor variations

  • Ginger– Add 1/4 teaspoon of ginger extract. 
  • Rose– Whisk through 1/2 teaspoon rosewater extract once the simple syrup has cooled. 
  • Mint– Add 1/4 teaspoon peppermint extract and add fresh mint leaves once the syrup has cooled. 
  • Lavender– Fold through 1/2 teaspoon lavender extract halfway through the simmering stage. 
  • Vanilla– Add 1/2 teaspoon vanilla extract or a vanilla bean pod. 

Storing and freezing low carb simple syrup

  • To store: Simple syrup can be stored at room temperature, in a sealed container, for up to 2 months. If you’d like to keep it longer, store it in the refrigerator and it will keep well for up to 6 months. 
  • To freeze: Place the jar of syrup in the freezer and store it there for up to 6 months. 

low carb simple syrup

What to add simple syrup to

keto simple syrup

Keto Simple Syrup- 2 ingredients!

5 from 184 votes
This keto simple syrup is a low carb and sugar free take on the classic beverage addition! Made with just 2 ingredients, it's perfect for both alcoholic and non-alcoholic beverage!
Servings: 12 servings
Prep: 1 minute
Cook: 5 minutes
Total: 6 minutes



  • In a small saucepan, add the water and granulated sweetener and place over low heat. Regularly whisk the mixture until the sweetener dissolves. Once the syrup begins to simmer, whisk through the xanthan gum, before removing from the heat.
  • Allow the syrup to cool completely, before transferring to a glass jar or bottle.


TO STORE: Simple syrup can be stored at room temperature, in a sealed container, for up to 2 months. If you'd like to keep it longer, store it in the refrigerator and it will keep well for up to 6 months. 
TO FREEZE: Place the jar of syrup in the freezer and store it there for up to 6 months. 


Serving: 1servingCalories: 1kcalCarbohydrates: 1gSodium: 2mgPotassium: 1mgFiber: 1gCalcium: 1mg
Course: Drinks
Cuisine: American
Author: Arman Liew
Tried this recipe?Give us a shout at @thebigmansworld or tag #thebigmansworld!

Arman Liew

I’m a two time cookbook author, photographer, and writer, and passionate about creating easy and healthier recipes. I believe you don’t need to be experienced in the kitchen to make good food using simple ingredients that most importantly, taste delicious.

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Recipe Rating


  1. 5 stars
    This comment is meant to help anyone considering this recipe using Lakanto erythritol monk fruit blend. It does not work. The simple syrup started to crystallize as soon as it began to cool. Within several hours it was a chunky solid mass with a think layer of liquid on top. It didn’t stop me from using an ounce of it for my tart cherry vodka cocktail though!! 😉. Looking forward to retrying with another product.

  2. Hi! Allulose seems fine for simple syrup. But my experience with Erythritol-containing sweeteners has been different. If I heat an Erythritol-containing syrup mixture, let it cool, & then refrigerate it, I end up with a mass of crystals & some liquid that really isn’t useable. Maybe it would work ok if the mixture was only lightly warmed & then stored at room temperature — that’s not something I’ve tried. Anyway, the noting Erythritol & potential crystalization in the recipe might save folks some disappointment.

    1. 5 stars
      You can get a lovely, thick syrup that is as thick as honey if you use allulose. I simmer until I get the thickness I’m looking for, and I then I add a couple of squirts of liquid sucralose or a little stevia extract. Allulose isn’t sweet enough for me usually, so I up the sweetness with other sweeteners. Do NOT use erythritol. It ends up completely crystallized. Even if I mix it with allulose, the erythritol crystallizes. Once you have a simple syrup, add honey extract or maple syrup extract and you have keto honey and maple syrup. It’s just about perfect.

  3. Hi! This is my first attempt making a simple syrup of any kind. I used to buy it, but since have gone Keto and now, although not following Keto anymore, I have decided to remain sugar free. This is an amazing recipe to use in homemade lemonades and margaritas. When I made it, it was perfect, however upon cooling it became cloudy when I poured it into the jar. Do you think you can tell me why? Any help would be greatly appreciated. I used granulated Erythritol.