Keto Lemonade


5 from 15 votes
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This keto lemonade recipe is low-carb, sugar-free, and made with 3 simple ingredients. It’s my favorite refreshing drink on a warm summer day! 2 grams of net carbs. 

Thirsty for more keto drink recipes? Try my keto pink drink, keto mojito, and keto drink mix next.

keto lemonade

Growing up, my mom always made sure we had a pitcher of homemade lemonade in the fridge. While ours was loaded with sugar, I decided to give it a low-carb makeover. 

Table of Contents
  1. Can you drink lemonade on keto?
  2. Ingredients needed
  3. How to make keto lemonade
  4. Recipe tips and variations
  5. Storage instructions
  6. More keto drinks to try
  7. Keto Lemonade (Recipe Card)

Can you drink lemonade on keto?

Lemons are both keto-friendly and nutritious, containing high amounts of vitamin C, electrolytes, and fiber. Unfortunately, the added sugar makes regular lemonade unsuitable for a keto diet. 

That’s why I made this keto version with no added sugar. Here’s why I’ve been loving this recipe:

  • Made with 3 ingredients. No niche or complicated ingredients are needed, so I can make it on a whim.
  • Fun to customize. I’m boring and like my lemonade plain, but there are countless ways to customize this base recipe to make it different every time. I’ll give you plenty of ideas later on. 
  • Easy to make ahead. Come summertime, I make a double batch of low-carb lemonade. It stores wonderfully and tastes just as fresh the next day. 
  • No fake sugary aftertaste. There are plenty of sugar-free lemonades on the market, but I’ll be honest: I’ve yet to find one without a bitter or metallic aftertaste. I use a keto simple syrup to guarantee a smooth finish with no funky finish.

Ingredients needed

  • Sugar free simple syrup. I used a homemade keto simple syrup. All you need is water and sugar-free sweetener (I like allulose) to make it, and it’s perfectly smooth and thick.
  • Lemon juice. Bottled or fresh lemon juice. 
  • Water OR seltzer water. Use water if you are making traditional lemonade, but seltzer works if you are serving it immediately. 

How to make keto lemonade

I’ve included step-by-step photos below to make this recipe easy to follow at home. For the full printable recipe instructions and ingredient quantities, scroll to the recipe card at the bottom of this post.

Step 1- Combine ingredients. In a glass jug, add the simple syrup and lemon juice and whisk together. Add water and stir until combined.

Step 2- Serve. Pour into glasses filled with ice, and refrigerate the remaining lemonade.

sugar free lemonade

Recipe tips and variations

  • Make lemonade ice cubes. This is my #1 hack for drinks that I don’t want to get diluted. Simply make some extra lemonade and freeze it in an ice cube tray. When you’re ready to pour a glass, use the lemonade ice cubes instead. 
  • Make lemon syrup. If you omit the water in this recipe, you’ll end up with a concentrated lemon simple syrup that’ll stay fresh in the fridge for up to 1 month. When you’re ready to make lemonade, just add 3 tablespoons of lemon simple for every 1 cup of water. 
  • Add a pinch of sea salt for even more natural electrolytes. 
  • Garnish. I like to add a few lemon slices to the pitcher or in each glass for a pretty aesthetic. 
  • Add other fruits. Either in the pitcher or individual glasses, add fresh berries like raspberries, blackberries, blueberries, or strawberries. 
  • Swap the citrus. Try limes or grapefruit instead. 
  • Add herbs. You’d be amazed at what a few mint leaves, rosemary sprigs, or lavender can do to a pitcher of lemonade. 

Storage instructions

To store: Place the prepared lemonade (with water) into a glass jar or bottle and store it in the refrigerator for up to 2 weeks. 

To serve: Add 2-3 ice cubes into a glass and fill with homemade lemonade. 

low carb lemonade

More keto drinks to try

keto lemonade

Keto Lemonade

5 from 15 votes
This keto lemonade is made with a sugar free simple syrup and fresh lemons! Perfect with water or seltzer, it's refreshing when served over ice!
Servings: 8 servings
Prep: 1 minute
Cook: 1 minute
Total: 2 minutes



  • In a glass jug, add your simple syrup and lemon juice and whisk together. Add your water and whisk until combined.
  • Pour into glasses filled with ice, and refrigerate leftovers.


* You can use seltzer (or soda water), but you cannot keep it for any longer than 24 hours. 
TO STORE: Place the prepared lemonade (with water) into a glass jar or bottle and store it in the refrigerator for up to 2 weeks. 
TO SERVE: Add 2-3 ice cubes into a glass and fill with homemade lemonade.


Serving: 1servingCalories: 3kcalCarbohydrates: 1gProtein: 1gFat: 1gSodium: 12mgPotassium: 8mgFiber: 1gVitamin A: 1IUVitamin C: 3mgCalcium: 8mgIron: 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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  1. it was never mentioned in this article what kind of sweetener goes into simple syrup obviously it’s not sugar is it monk fruit sugar is it erythral sugar or however you spell that is it coconut sugar stevia? please and thank you Tatiana