Sugar-Free Keto Lemonade | Single Glass Recipe
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Introduction
Half a lemon, a glass of water and a tablespoon of sweetener. That is the entire thing, and it tastes like lemonade rather than like something standing in for it.
Lemonade Without the Sugar
Lemonade is a classic delicious drink that everybody loves. Seriously, I’m pretty sure that at some point the entire world has come together to unanimously decide that lemonade is good. You can’t deny it. What keeps it off a keto day is the sugar — a tall glass of the ordinary kind carries a good deal of it.
One Glass at a Time
I make lemonade by the glass rather than by the pitcher, which is why the recipe is written that way; scale it up if you would rather have a jug of it in the fridge. Fresh lemons are better in my opinion, but bottled juice works here.
Granulated Monk Fruit or Liquid Extract?
Dylan and I use Lakanto’s granulated monk fruit sweetener here, and the tablespoon in the recipe is that blend. It takes a little stirring to dissolve in a cold glass; a liquid monk fruit extract goes in instantly instead, which is the appeal of it — but an extract is a concentrate dosed in drops rather than spoons, so follow the dosing on your own bottle rather than the tablespoon below. We use Lakanto because we don’t get an aftertaste from it, and that is hard to hide in something as plain as lemonade.
Not sure which sweetener you have? Our monk fruit sweetener guide compares the different blends and liquid extracts.
You’ll find the full per-serving breakdown — calories, fat, fiber, protein, and net carbs — in the Nutrition Facts panel with the recipe below.
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Enjoy!
Ingredients
Nutrition Facts
1 serving per recipe| Per Serving 10 | Per Recipe 10 | |||
| ½ lemon | 8.5 | 8.5 | ||
| 0g | 0% | 0g | 0% | |
| ½ lemon | 0.1 g | 0.1 g | ||
| Saturated Fat | 0g | 0% | 0g | 0% |
| Trans Fat | 0g | 0% | 0g | 0% |
| Cholesterol | 0mg | 0% | 0mg | 0% |
| 10mg | 0% | 10mg | 0% | |
| 8 oz of water | 9.09 mg | 9.09 mg | ||
| ½ lemon | 0.5 mg | 0.5 mg | ||
| 15g | 5% | 15g | 5% | |
| ½ lemon | 2.7 g | 2.7 g | ||
| 1 tbsp of lakanto classic monkfruit sweetener | 12 g | 12 g | ||
| 1g | 3% | 1g | 3% | |
| ½ lemon | 0.8 g | 0.8 g | ||
| 1g | 1g | |||
| ½ lemon | 0.75 g | 0.75 g | ||
| 12g | 12g | |||
| 1 tbsp of lakanto classic monkfruit sweetener | 12 g | 12 g | ||
| Allulose | 0g | 0% | 0g | 0% |
| 2g | 2g | |||
| ½ lemon | 1.9 g | 1.9 g | ||
| 0g | 1% | 0g | 1% | |
| ½ lemon | 0.3 g | 0.3 g | ||
About these numbers: We are home cooks, not certified nutritionists. Nutrition is shared as a courtesy. We pick a representative product for each ingredient, and our recipe system works out the totals from the amounts in this recipe, so please treat them as a helpful estimate rather than a guarantee. The brands you buy, any swaps you make, and how generously you portion the recipe will all move these numbers.
Directions
Correction — September 15, 2026: The sweetener section now attributes measuring 1:1 with sugar to the blend that is formulated to do it, not to monk fruit, and describes what the sweetener does in the recipe rather than its effect on blood sugar.