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This homemade keto simple syrup can be used in so many different ways and requires just two ingredients: Besti + water! Not only is sugar-free simple syrup incredibly easy to make, but the particular sweetener used here makes it the best low carb simple syrup recipe. It dissolves effortlessly and tastes just like a sugar simple syrup. Use it for all of your keto cocktails!
What Is Simple Syrup?
Simple syrup is a slightly viscous, clear syrup, made of a 1:1 solution just sugar and water. Its main purpose is for use in drinks, but there are other ways to use it as well.
Obviously, the sugar makes it not-so-keto-friendly, which is why we needed our own low carb simple syrup recipe without sugar!
How To Make Keto Simple Syrup
This sugar-free simple syrup recipe couldn’t be easier! Ok, get ready….
- Combine water and Besti Monk Fruit Sweetener in a saucepan. It will be cloudy at first.
- Heat until dissolved. Bring to a boil, then simmer and stir frequently, until the sweetener is completely dissolved. It’s ready when it’s completely clear!
Low Carb Simple Syrup FAQs
Can you make sugar-free simple syrup?
Yes, sugar-free simple syrup is possible and it works really well – if you use the right sweetener.
Traditional simple syrup is made with a 1:1 ratio of sugar to water and our best sugar-free simple syrup is made in the same way. A 1:1 ratio of Besti to water!
Why use simple syrup vs just a granulated sweetener?
Because it mixes better! Stirring sugar into something can leave some of it sitting at the bottom, and this is even more true with keto sweeteners.
Which brings us to the next important question…
Can you use a different sweetener?
Yes and no.
Monk Fruit Allulose Blend is the absolute best keto sweetener to use for simple syrup, for two very important reasons:
- It dissolves like sugar. Most keto sweeteners, including erythritol and most brands of monk fruit, will not dissolve well.
- It tastes like sugar. There is no aftertaste that you might find with some others.
If you want to try it with a different sweetener, another option that would dissolve well isallulose. You’d need more of it, about 1 1/3 cup.
If you still want to attempt to make this sugar-free simple syrup using an erythritol-based sweetener, start with a powdered version. It still does not dissolve as well, but better than granulated.
Get The Best Sweetener For Keto Simple Syrup Here
Can you thicken sugar-free simple syrup?
Yes, you can. I left out any thickener because for the most common use (keto drinks!), it’s not necessary.
If you want to thicken it, just sprinkle on some xanthan gum and whisk vigorously, like I do for my keto maple syrup.
Sugar-Free Simple Syrup Storage Instructions
Can you make homemade sugar-free simple syrup ahead?
Yes, you can and should make keto simple syrup ahead.
Does simple syrup need to be refrigerated?
Yes, since this is a homemade keto friendly simple syrup and has no added preservatives, it’s best kept in the fridge. It will last at least 1 month.
Can you freeze sugar-free simple syrup?
Yes! It will last a very long time, at least a year.
How To Use Simple Syrup For Keto Recipes
If you like this keto simple syrup recipe, then you might need some recipes to use it in! Here are some keto cocktail recipes, plus other ways to use it:
- Skinny Mojito – Enjoy this refreshing keto friendly drink, plus read the complete guide on lots of others.
- Skinny Margarita – This margarita recipe is made with just a handful of ingredients and takes just 5 minutes!
- Sugar-Free Lemonade – This refreshing drink is great on its own or mixed with vodka for a refreshing summer drink.
- Coffee – Simple syrup is delicious in bulletproof coffee, a keto pink drink, or just about any other coffee drink you like.
- Keto cake – Poke holes and drizzle any cake with keto simple syrup to keep it extra moist.
- Keto fruit salad – Mix together some keto berries (check the keto food list for a list of low carb fruits you can use!), then toss with sugar-free simple syrup.
- Keto pancakes – Add a little extract to your simple syrup for flavor, then drizzle over low carb pancakes.
- Keto oatmeal – Stir the syrup in for effortless sweetness.
Tools To Make Keto Simple Syrup:
Click the links below to see the items used to make this recipe.
- Besti Monk Fruit Allulose Blend – The best sweetener for sugar-free simple syrup. It dissolves well and tastes like sugar.
- Glass Jars – My favorite storage solution, so I always have keto simple syrup for drinks I’m making.
- Cocktail Shaker and Strainer – All the tools you need to set up a bar at home.
Reader Favorite Recipes
The recipe card is below! Readers also made these similar recipes after making this one.

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Meet Wholesome Yum Keto Simple Syrup - it's sugar-free & naturally sweetened with Besti (a blend of monk fruit and allulose). NO aftertaste & 0 net carbs!
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Sugar-Free Keto Simple Syrup Recipe
Make your own homemade keto simple syrup in just 5 minutes - no sugar, carbs or calories! Low carb sugar-free simple syrup is perfect for all kinds of drinks.
Recipe Video
Click or tap on the image below to play the video. It's the easiest way to learn how to make this recipe!Ingredients
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Get Keto Sweetener For This Recipe
Meet Besti Monk Fruit Allulose Blend, the keto sweetener that tastes, bakes, dissolves, and browns just like sugar, with NO aftertaste and 0 net carbs.
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Get RECIPE TIPS in the post above, nutrition info + recipe notes below!
Click on the times in the instructions below to start a kitchen timer while you cook.
Combine the water and Besti in a medium saucepan.
Bring to a boil. Reduce heat and simmer, stirring frequently, for 4-5 minutes until dissolved.
Cool completely before using.
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Recipe Notes
Serving size: 2 tablespoons
Video Showing How To Make Keto Simple Syrup:
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Nutrition Information Per Serving
Where does nutrition info come from? Nutrition facts are provided as a courtesy, sourced from the USDA Food Database. You can find individual ingredient carb counts we use in the Low Carb & Keto Food List. Net carb count excludes fiber, erythritol, and allulose, because these do not affect blood sugar in most people. (Learn about net carbs here.) We try to be accurate, but feel free to make your own calculations.
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15 Comments
Dale C Wiggins
When you say 1:1, is that by weight or by volume? I have some Lakanto Monkfruit sweetener (granulated) that I was gonna try with this. I’m not sure if that brand will not work well. If so I’ll try the Besti. Thanks!
Maya | Wholesome Yum
Hi Dale, 1:1 sugar replacements typically refer to volume, though weight is pretty similar as well. I don’t recommend Lakanto for making simple syrup – it doesn’t dissolve well and will be gritty, or not sweet enough with the sweetener settling at the bottom. I cover sweetener alternatives in the FAQ in the post above, but long story short, Besti Monk Fruit Allulose Blend is the best sweetener for making a simple syrup. It’s one of very few that would truly dissolve properly. Also, I now have a premade sugar-free simple syrup in a bottle here.
Amanda
Hi, I have been trying to find a keto divinity recipe for a long time, which of course requires you to cook sugar and corn syrup to a hard crack stage, then pour it into some beaten egg white mixture. Do you happen to know if this syrup reaches a hard crack stage and could be used for such a purpose?
Wholesome Yum M
Hi Amanda, I’m sorry this is not something I have experimented with yet. I will be sure to add it to my list to try soon.
Elise Bosch
Can you make Keto simple syrup with fresh lavender flowers?
Wholesome Yum M
Hi Elise, I have not personally tried this, but I don’t see why it wouldn’t work. Dried or fresh should work well. Enjoy!
Katie
Interesting! It doesn’t appear very thick. Does it thicken up a bit as it sits, or does it go on to be very watery?
Wholesome Yum M
Hi Katie, Yes. Xanthan gum needs heat to activate it. It will thicken slightly while cooking but will turn to a thicker syrup consistency once it cools.
Michael Stalker
I’ve made other keto-friendly simple syrup. I find that the sugar substitute recrystallizes. How does Besti hold up? Also, do you know if I could powder the granulated version in a Vitamix? Thanks.
Wholesome Yum M
Hi Michael, Besti Monk Fruit Allulose Blend dissolves really well in liquids, so as long as it fully dissolves while hot, you shouldn’t need to run it through a blender. Also, it doesn’t crystallize, so it will store in the fridge really well for the long term. Enjoy!
Ashley Bourgeois
So just tried this but made it a 2:1 ratio so would need to use less and it all crystalized in the fridge….is it because of the 2:1 ratio?
Wholesome Yum M
Hi Ashley, Did you use allulose of erythritol in your simple syrup?
Astrid
This sounds great. I was wondering if I could add a couple of sticks of cinnamon while the mixture is boiling to make a cinnamon flavor syrup to add to my Frappuccino later on.
Wholesome Yum M
Hi Astrid, I have not tried this, but it should work great! Enjoy.
Beth
This is amazing! I love this recipe! Thank you!