Tart, icy, and silky smooth, this keto vodka lemonade blends fresh squeezed lemon juice, a touch of monkfruit, and your favorite vodka over ice, at 4.6g net carbs. I blend everything until the ice disappears into slush, and pinches of salt round the tartness so it drinks like real lemonade.
I’ve been making this cocktail since I went keto in 2012, and the version here is where I landed after testing it more times than I can count. Different sweetener ratios, lemon-to-water proportions, blended versus on-the-rocks. Each batch got a little closer. This is the one that stuck.
The biggest thing I figured out: use about 1/3 cup of monkfruit instead of the full 1/2 cup. That’s when the lemon really cuts through instead of just making everything sweet. One of my readers, Tiffany, landed on the same ratio independently, and Rosa dialed hers back too, which told me I was onto something. If you want it sweeter, add more. But start low.
I serve this blended most of the time. My keto mojito is the only other cocktail I blend regularly, so having two options when people come over is nice. If you’re hosting, set out a peach bellini or an appletini alongside this and you’ve got a full sugar-free cocktail bar with almost no prep.
Something I started doing after a reader mentioned it: I toss in 8-10 fresh mint leaves before blending. It turns into a mojito-lemonade hybrid that I almost prefer to the original. Min Johnson in the comments discovered this before I did, and now I make the mint version about half the time.
For pitcher batches, I double or triple the lemonade base (water, lemon juice, and sweetener), leave the vodka out, and let people pour their own over fresh ice so nobody's drink gets watered down. The lemonade base keeps in the fridge for about 3 days. The key is dissolving your sweetener in a few tablespoons of warm water before adding it to the pitcher. Otherwise it settles to the bottom and goes grainy (I learned this the hard way, and readers have asked about the same problem).
At 4.6g net carbs per serving, this is one of those low carb cocktails that actually tastes like a real drink, not a diet substitute. Reader Tony put it better than I could: he went 8 months on keto avoiding all cocktails, made this with fresh-squeezed lemon, and said it “completely killed that logic.” That’s the kind of feedback that tells me the recipe works.
You can also make this without alcohol. Skip the vodka and add sparkling water or club soda for some fizz. The lemonade base stands on its own as a sugar-free refresher. I keep a batch in my fridge most weeks during summer, and my kids drink it too.
Are lemons keto?
Yes, lemons are fine on keto. One whole lemon has 3.4 grams net carbs, and you’re splitting that across multiple servings in a recipe like this. I use them constantly for drinks, desserts, and marinades. They add brightness without adding sugar, which is exactly what you want when you’re working with sugar-free sweeteners.
Is vodka keto friendly?
Yes, vodka has zero carbs. All distilled spirits do. I don’t stress about the vodka side of this drink at all. The carbs in a cocktail almost always come from the mixer, which is why I make my own lemonade base instead of reaching for a store-bought mix loaded with sugar.
Is vodka gluten free?
I try to keep gluten out of my diet when I can. The good news is that virtually all plain vodka is naturally gluten free, even when it’s distilled from wheat or rye. The distillation process removes the gluten proteins. Where I’d be careful is flavored vodkas. Some flavored spirits add extracts or ingredients after distillation that can contain gluten, so I stick with plain and add my own flavor through the lemonade base.
Which sweetener works best in cocktails?
Powdered sweetener dissolves better than granulated in cold drinks. I learned this after a few batches where granulated monkfruit just sat at the bottom of the glass. If you’re blending, either form works since the blender breaks it down. But for over-the-rocks, go powdered.
I go back and forth between Lakanto and Swerve. Swerve measures cup for cup with sugar. Lakanto powdered monk fruit is 2x as sweet, so you only need about 1/4 cup. Both work well here. If you want a different option entirely, erythritol or allulose also dissolve cleanly in cold liquid.
Blended or on the rocks
I make this blended about 80% of the time. A high-powered blender pulverizes the ice into a smooth slushy with no chunks. I use a BlendTec, but any decent blender will get you there.
For on-the-rocks, fill a glass with ice, pour in 2 oz. of vodka and 6 oz. of the sugar-free lemonade base, and stir. I actually prefer this version when I’m making it just for myself on a weeknight. Less cleanup.
How many carbs and calories are in this cocktail?
Vodka has zero carbs, zero sugar, and about 97 calories per 1.5 oz shot. The carbs in any cocktail come from the mixer, not the spirit. That’s why this entire drink comes in at just 4.6g net carbs and 152 calories per serving, depending on how heavy you pour. The lemonade base adds almost nothing since it is water, lemon juice, and a zero calorie sweetener, so nearly all of those calories come from the 2 oz of vodka in each glass.
I’ve seen people avoid cocktails entirely on keto because they assume the carbs are high. They usually are when you’re using commercial mixers. But when you control the sweetener, the math works out. Stick with distilled spirits and make your own mixers, and you can have a drink without wrecking your macros.
Other keto drinks worth trying
If you like this one, here are a few more I keep in rotation:
Nutrition is an estimate calculated from the ingredients listed. Brands vary, so check labels if you track closely.
Frequently Asked Questions
Can I make this in a cocktail shaker instead of a blender?
Yes, a cocktail shaker works. I dissolve the monkfruit in 2-3 tablespoons of warm water first, then shake it with the lemon juice, water, a pinch of salt, and the vodka over ice. Skip that step and grit settles at the bottom of the glass. In the blender the sweetener dissolves on its own, so the warm water only matters for shaken or over the rocks drinks.
Are flavored vodkas keto?
Not always. Some flavored vodkas are sweetened with added sugar, and those carbs land in your glass even though the spirit itself started at zero. Check the label on any flavored bottle. Plain vodka is the safe buy, and it is what I use for this drink so the only sweetness comes from the monkfruit I measure myself.
Can I use bottled lemon juice instead of fresh-squeezed?
I've made it both ways. Fresh-squeezed tastes noticeably brighter, and it's what I use when I have lemons around. But bottled works in a pinch. I'd avoid the ones with added preservatives or sweeteners and look for 100% lemon juice. The carb count stays about the same either way.
Can I use stevia instead of monkfruit?
Yes. The card says sweetener of choice for a reason. Just do not swap stevia 1:1 for the 1/2 cup of monkfruit. Stevia is far more concentrated, and it turns bitter fast in something this acidic. I start with a small amount, blend, taste, and add from there. If you want a sweetener that measures like the monkfruit, erythritol or allulose both dissolve cleanly in cold liquid.
I wasn’t sure anything sweetened with monkfruit could land the same as the pitcher of spiked lemonade my sister used to set out at her Fourth of July thing every year. That was Country Time and whatever bottom-shelf vodka, nothing fancy, but it tasted like summer. Made this with fresh-squeezed last week and it got there. The pinch of salt surprised me, honestly. Cuts the sweetness just enough that it doesn’t taste like a substitute. Four years keto and I’d given up on that whole category. This put it back.
Figured monkfruit would leave that cooling aftertaste in something cold, but the lemon drowns it out. Way cleaner than the zero-sugar lemonades I keep grabbing at the store and keep regretting.
Pool party Saturday and this is THE cocktail. Can I blend the lemon juice, monkfruit, and water the night before and just add vodka and ice when we’re ready to pour?
That base keeps for 3 days in the fridge, so overnight is easy. I usually leave the vodka out and let guests pour their own. Add ice right when you’re ready or it waters down.
By batch three I stopped premixing. Keep the lemon base separate in the fridge, pour the vodka per glass. Goes flat overnight when stored mixed. Way cleaner, and everyone adjusts their own.
Stevia works here, the recipe already says sweetener of choice in the ingredients. Just don’t go 1:1, stevia is way more concentrated and gets bitter fast in something this acidic. Start small and taste up.
152 calories WITH the vodka already in it is frankly embarrassing for how well this drinks. I swapped one cup of the water for club soda and stirred it in after blending instead of blending it through, and the carbonation changes everything. Less ‘made in a blender at noon,’ more something you’d actually pay for at a bar. Running batches of this all summer.
Making this for our pool party next Saturday and honestly I don’t want to deal with hauling the blender outside (our patio is up three steps, which is more annoying than it sounds). Do you think a cocktail shaker would work, or does the blending actually do something to the lemon juice texture? I figure with the monkfruit being fine powder it’d dissolve fine either way.
Cocktail shaker works. Pre-dissolve the monkfruit in a tiny bit of warm water before you shake, otherwise you’ll get grit settling at the bottom of the glass.
Good base but I pulled it back to 1/3 cup monkfruit because at the full half cup the lemon completely disappears. At that ratio it finally tastes like lemonade and not just sweet vodka water.
Yeah, lemon disappears fast when you push the sweetener. I taste and adjust every batch anyway since monkfruit varies a lot by brand. 1/3 cup is probably the right call for most people.
My husband poured himself a glass last night, didn’t say a word until it was almost gone, then said it could stand to be a little sweeter. From him, that’s a rave review.
Blended up a big batch for a spring gathering last weekend and portioned it over ice as people arrived. Two friends who are not keto at all kept refilling their glasses, and one asked specifically if I’d used simple syrup because the sweetness was so clean. The monkfruit really does dissolve without any aftertaste. This is my go-to for warm weather hosting now.
Made a batch for girls’ night last weekend and two friends who weren’t doing keto switched to it halfway through their regular drinks. The fresh lemon and monkfruit ratio just tastes clean, not diet-y. Making it again for the next one.
Double-batched this for a backyard thing Saturday and the most keto-skeptical person I know polished off two cups of the fresh-squeezed before anyone thought to mention it was sugar-free.
Made a batch Friday evening and my husband, who has never once asked for a non-beer drink in 12 years of marriage, wanted to know if there was enough to fill a full glass for him. He came back to the blender to check for more after he finished it, which is the real review right there. One note: I backed off on the monkfruit since I like mine properly tart, not sweet, so adjust to taste before you serve a crowd.
I make mine on the tart side too when it’s just for me. Set the monkfruit higher in the recipe because it’s easier for people to pull back than to fix something undersweetened mid-party. And yeah, husband going back to check the blender is the real review.
Added a few fresh mint leaves before blending and it came out tasting like a mojito-lemonade crossover. Not sure I can go back to the original version at this point.
8 months keto, no cocktails, nothing felt worth the carb math. Made this with fresh-squeezed lemon last weekend and completely killed that logic. 4.6 net carbs for something that actually tastes like a real drink.
Made this five or six times now. Been dialing back the monkfruit so the lemon really comes through, and it hit that balance perfectly last night. Cold February outside, but lemonade still works somehow.
Lemonade in February is valid. I actually go lighter on the monkfruit too, somewhere around 1/3 cup – that’s when the lemon really cuts through instead of just sweetening everything.
I was honestly nervous about making this (never really made cocktails from scratch), but blending the lemon juice and monkfruit together first actually worked great. Only 4.6g net carbs per serving is pretty wild for a lemonade drink. Does the monkfruit sweetener dissolve fully when you blend it or does it leave any gritty texture?
Blending takes care of it. Monkfruit dissolves pretty fast in liquid so you won’t get that gritty texture you’d get just stirring it in. 4.6g for a cocktail is kind of hard to believe, right?
