Refreshing Cucumber Lime Margarita
Published October 20, 2019 • Updated February 26, 2026
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I blend this keto cucumber margarita in big batches because one glass is never enough. Crisp cucumber, fresh lime, and a sugar-free simple syrup that actually dissolves clean in a cold drink.
I made my first cucumber lime margarita years ago after ordering one at a restaurant and thinking there’s no way I can’t make this work without sugar. Took me a few rounds to get the sweetener right (more on that below), but this version has been my go-to batch cocktail since 2019.
Most cucumber margarita recipes online are built for one drink in a shaker. Mine fills a blender. I use 8oz of tequila, a full cucumber, and enough ice to make it frozen, because I’ve never once made this for just myself. Friday nights, backyard hangs, someone’s birthday on the patio. This is a crowd drink, and the blender does all the work.
The sweetener piece is the part I want you to get right. I tested both granulated and powdered erythritol in cold drinks, and granulated creates a cooling aftertaste that gets worse the colder the drink gets. Powdered erythritol dissolves completely into the simple syrup and you don’t taste it at all. That one swap is the difference between “this tastes like a diet drink” and “wait, this is keto?”
The cucumber does most of the heavy lifting flavor-wise. I peel it first (the skin gets bitter when blended) and slice it thick so the blender catches everything. Fresh lime juice is non-negotiable. Bottled works in a pinch but the flavor is flatter. You’ll taste the difference.
If you want a spicy version, slice 3-4 rounds of jalapeño and blend them right in. I remove the seeds first because the heat can bury the cucumber if you’re not careful. A Tajín rim instead of plain salt is another easy upgrade that adds a little chile-lime bite without any extra carbs.
For anyone wondering about Triple Sec (the orange liqueur in a traditional margarita), skip it. Most brands run 10-11g carbs per ounce. I add a tiny splash of orange extract instead, maybe 1/4 teaspoon, and it gives you that same citrus layer without the sugar. The whole batch comes out to roughly 1g net carb per serving, which is about as low carb as a cocktail gets.
One of my readers, Ray, told me he made this on a random Friday night in February trying to recreate a cucumber margarita from a bar he and his wife used to go to before keto. His words: “It tastes close, closer than I thought possible with the erythritol simple syrup instead of sugar.” He made it twice that week. That’s the kind of feedback that tells me the recipe actually works.
If you’re into keto cocktails, I have a classic keto margarita that’s more traditional, a keto mojito for mint lovers, and a keto piña colada if you want something tropical. My keto strawberry daiquiri is another blender drink that works the same way for batches.
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Ingredients
1/3 cup powdered erythritol -
8 oz tequila
-
juice from 2 limes
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1 cucumber, peeled and sliced
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1 teaspoon salt
-
ice
Step by Step Instructions
Step by Step Instructions
Make the simple syrup
To make sugar free simple syrup, add 1/3 cup water and powdered erythritol to a small saucepan. Stir to combine and heat until boiling. Remove from heat and let cool.
Add to blender
Add all ingredients to a blender, including the simple syrup, 1/2 cup water and enough ice to fill 3/4 of the blender or as desired.
Nutrition disclaimer
The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.
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Get My Macros + Recipes →Frequently Asked Questions
Should I use powdered or granulated erythritol for this margarita?
I've tested both, and powdered is the only way to go for cold drinks. Granulated erythritol creates a cooling aftertaste that gets more noticeable the colder the drink is. Powdered dissolves completely into the simple syrup and you won't taste it at all. I learned this the hard way after making a batch with granulated that tasted like I'd added menthol.
What can I use instead of Triple Sec to keep this low carb?
I skip Triple Sec entirely because most brands have 10-11g carbs per ounce. Instead, I add about 1/4 teaspoon of orange extract to the blender. It gives you that same citrus background without any sugar. I've also tried a splash of sparkling orange water and it works, just adds a little fizz to the texture.
Can I make a spicy jalapeño version?
I do this all the time. I slice 3-4 rounds of fresh jalapeño and toss them right into the blender with everything else. I always remove the seeds first because the heat can completely overpower the cucumber if you leave them in. Start with 2 slices if you're not sure about your spice tolerance. The cucumber and lime balance the heat really well.
Tajín or salt rim, which is better?
I go back and forth honestly. Plain salt is classic and clean. But Tajín adds a chile-lime bite that pairs so well with the cucumber that I reach for it more often now. It has less than 1g carbs per 1/4 teaspoon, so it won't affect your macros. I run a lime wedge around the rim and dip it. Works great on my sugar free blue hawaiian too.
How long does the sugar-free simple syrup keep in the fridge?
I make a bigger batch of simple syrup and keep it in a mason jar in the fridge. It lasts about 2 weeks with no issues. I've pushed it to 3 weeks and it was still fine, but the texture starts to get a little thicker. Having it pre-made means I can throw this together in about 2 minutes flat.
Can I make this as a single serving instead of a full batch?
I've scaled this down plenty of times. For one drink, use 2oz tequila, juice from half a lime, about a third of a cucumber, a tablespoon of simple syrup, and a handful of ice. I still use the blender even for a single serving because that's what gives it the frozen texture. If you want something lighter, my keto lemonade is a good non-alcohol option.
Does this work without a blender?
You can muddle the cucumber and shake it with ice, but I'm going to be honest, it's a completely different drink. The blender is what gives this that smooth frozen texture. Muddling leaves cucumber chunks and you end up straining out most of the flavor. If you have any kind of blender, even a small one, use it. My cucumber smoothie uses the same blended approach.
Can I use English cucumber instead of regular?
I've used both. English cucumbers have thinner skin and fewer seeds, so they blend a little smoother. Regular cucumbers work just as well as long as you peel them first (I always peel either way because the skin gets bitter when blended). The flavor difference is minimal. I just grab whatever my grocery store has that week.
Cucumber lime margaritas are a twist on your typical margarita cocktail. The cucumber helps to mellow out the tanginess from the limes. Sugar free simple syrup is added to give a little bit of sweet without the sugar. Blend it or serve over ice. This margarita will quickly become one of your favorites.
This recipe creates a whole pitcher of margaritas so you can share with friends and family. Enjoy a low carb cocktail at a BBQ, potluck or while you are tailgating at the game.
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Simple syrup is used in many different cocktail recipes. Traditional simple syrup is made by dissolving sugar in water. To make a sugar free simple syrup we use powdered erythritol. My preferred powdered erythritol is by 
Like the majority of spirits, tequila is allowed on a keto diet. In fact, a shot of tequila has ZERO carbs in it! It’s easy to enjoy a skinny margarita or low carb cocktail since most hard alcohol is free of carbohydrates.
The tequila I use in the recipe and the type I like best for a keto cocktail is silver tequila. It is a lot smoother in my opinion.
Do you prefer margaritas on the rocks or blended? Either way, you can enjoy this cucumber lime margarita. I prefer blended. My 
Many people love a salted rim glass for their margarita. To achieve this, simply run a lime slice around the rim of an empty glass. Flip it upside down over a plate of salt and twist. The salt will stick to the rim of the glass. Pour your margarita!
Another variation is to dip the rim of an empty glass into a small plate containing [ChocZero Vanilla Syrup]. This syrup is sugar free too. The vanilla is a delicious addition to this cucumber lime margarita. You can add food coloring to the vanilla syrup to create a fun dripping effect. When you add red food coloring to the ChocZero Vanilla Syrup, it makes a fun festive drink for Halloween or Christmas! Call it a Zombie Margarita or a Tipsy Elf.
Added a jalapeño half (seeds out) and a handful of fresh mint, and the whole thing clicked. The heat wakes up the lime and the erythritol sweetness stops sitting so far forward. This is a better margarita than what I was ordering at my favorite Mexican place before going keto, which is not something I expected to type. Four stars for the original, but with jalapeño it's a straight five.
I've made this probably six times since I found it, and every time I have the same problem: I double the batch thinking that'll be enough and it still disappears in one sitting. The powdered erythritol in the simple syrup was the thing I was most skeptical about (I've had too many keto drinks with that gritty aftertaste), but it dissolves completely and you'd never know. The cucumber makes it feel genuinely refreshing, not just sweet, and the lime cuts through everything in a way that actual margaritas sometimes don't even do. I made a pitcher last weekend when the weather finally started turning, sat outside with it, and it felt like a proper spring evening. It's become my go-to whenever I want something that actually feels like a treat and not a compromise. Already thinking about tripling the batch next time and seeing if I can still fit it in my blender.
Triple fits. Blend the cucumber and liquid first, add ice after, or it overflows. Learned that the hard way.
Eight batches in, I finally froze the cucumber slices instead of adding fresh with ice. Flavor hits harder, nothing dilutes. Never going back.
Been making this every few weeks since last summer and finally dialed in the ratio I keep coming back to. Adding closer to a full cucumber instead of what's called for pushes the flavor way forward without it tasting like spa water, which was my main worry going in. The powdered erythritol syrup is still the part that gets me. No grittiness at all, just clean and bright in a cold blender drink. Not what I expected the first time, and I haven't made them any other way since.
Yeah the lime is what keeps the full cucumber from going flat on you. I've pushed it that direction too and the ratio holds.
There was this place my wife and I used to go to, years before keto, that had a cucumber margarita I thought about more than I probably should have. Made this on a Friday night in February just to have something different, not expecting it to actually land. But the second that cucumber and lime hit the blender, I had to stop (smell does that). It tastes close too, closer than I thought possible with the erythritol simple syrup instead of sugar. I've had that sweetener get weird on me before but here it just works. Made it twice this week and I'm already thinking about July.
That smell thing is real. The erythritol took the most testing honestly. Granulated has a cooling aftertaste that gets worse cold, powdered doesn't have that.