Why You’ll Love This Recipe
This Keto Long Island Iced Tea Cocktail is a refreshing, low-carb twist on the classic cocktail! Made with diet cola, lemon juice, and a splash of simple syrup sweetened with Swerve, this drink delivers the same vibrant flavor as the original but without the sugar. Perfect for enjoying on a hot day or serving at a gathering, this keto-friendly version will satisfy your craving for a cool, crisp, and boozy beverage without kicking you out of ketosis.

Ingredients
For the Cocktail:
- 2 tablespoons lemon juice
- ½ cup diet cola
- 1 tablespoon simple syrup (recipe below)
- ⅛ teaspoon orange extract
For the Simple Syrup:
- ¼ cup Swerve sweetener
- ¼ cup water
Optional Garnish:
- Lemon slice
- Orange zest (for extra orange flavor)
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
Directions
- Make the Simple Syrup
In a small saucepan, add the water and Swerve sweetener. Bring to a simmer, stirring occasionally, until the sweetener dissolves completely. Once dissolved, set aside to cool. - Prepare the Cocktail
In a shaker bottle or small pitcher, combine the lemon juice, diet cola, 1 tablespoon of the simple syrup, and orange extract. Stir or shake well to combine. - Serve
Fill two tall glasses with ice and pour the cocktail mixture over the ice. Taste and adjust the sweetness by adding more simple syrup if desired. - Garnish and Enjoy
Garnish with a slice of lemon and, if you like, a bit of orange zest for an extra burst of citrus flavor. Serve and enjoy your refreshing, keto-friendly Long Island Iced Tea!
Servings and Timing
This recipe makes 2 servings. The preparation time is about 5-10 minutes, making it a quick and easy cocktail option for any occasion.
Variations
- Stronger Orange Flavor: For a more pronounced orange taste, add more orange extract or incorporate a small amount of orange zest into the drink.
- Make It Fruitier: Add a splash of sugar-free cranberry juice or another keto-friendly fruit juice to give your cocktail a new twist.
- Alcohol Variations: While the classic Long Island Iced Tea uses a mix of several liquors, you can adjust the alcohol content based on your preference or make it a lighter drink by reducing the amount of liquor.
Storage/Reheating
This cocktail is best enjoyed fresh. However, you can make the simple syrup in advance and store it in the refrigerator for up to 2 weeks. Just shake it up before using again.

FAQs
Can I use regular sweetener instead of Swerve?
Yes, you can use other low-carb sweeteners like erythritol or monk fruit, but make sure it dissolves well in the water to make a smooth syrup.
Can I make this drink non-alcoholic?
Yes, you can easily leave out the alcohol for a refreshing non-alcoholic version. It will still taste great and be perfect for anyone who wants a keto-friendly mocktail.
Can I use a different soda instead of diet cola?
You can use other sugar-free sodas like diet ginger ale or club soda, though they’ll alter the flavor of the cocktail slightly.
Can I make this in larger quantities for a party?
Yes, you can multiply the ingredients to make a larger batch. Just mix all the ingredients (except for the ice) in a pitcher and serve over ice when you’re ready to drink.
Conclusion
This Keto Long Island Iced Tea Cocktail is the perfect drink to enjoy on a hot day or at a gathering without worrying about the carbs. With the right balance of citrus, sweetener, and diet cola, it’s a guilt-free way to indulge in a classic cocktail. Refreshing, low-carb, and full of flavor, it’s the ultimate drink for anyone following a keto lifestyle. Cheers!
Print
Keto Long Island Iced Tea Cocktail
- Total Time: 5-10 minutes
- Yield: 2 servings
Description
The Keto Long Island Iced Tea Cocktail is a low-carb, refreshing twist on the classic drink, made with diet cola, lemon juice, and a keto-friendly simple syrup. Perfect for a hot day or a gathering, this drink delivers vibrant flavor without the sugar.
Ingredients
2 tablespoons lemon juice
½ cup diet cola
1 tablespoon simple syrup (recipe below)
⅛ teaspoon orange extract
For the Simple Syrup:
¼ cup Swerve sweetener
¼ cup water
Optional Garnish:
Lemon slice
Orange zest (for extra orange flavor)
Instructions
- Make the simple syrup: In a small saucepan, combine the water and Swerve sweetener. Bring to a simmer, stirring occasionally, until the sweetener dissolves completely. Set aside to cool.
- Prepare the cocktail: In a shaker bottle or small pitcher, combine the lemon juice, diet cola, 1 tablespoon of the simple syrup, and orange extract. Stir or shake well to combine.
- Serve: Fill two tall glasses with ice and pour the cocktail mixture over the ice. Adjust sweetness by adding more simple syrup if desired.
- Garnish with a slice of lemon and orange zest. Serve and enjoy!
Notes
- For a stronger orange flavor, add more orange extract or a small amount of orange zest.
- Make it fruitier by adding a splash of sugar-free cranberry juice or another keto-friendly fruit juice.
- Adjust the alcohol content or make a lighter version by reducing the amount of liquor used in the original recipe.
- The simple syrup can be made in advance and stored in the refrigerator for up to 2 weeks.
- Prep Time: 5-10 minutes
- Cook Time: 0 minutes
- Category: Cocktail
- Method: Shaking
- Cuisine: Keto, Low-Carb
Nutrition
- Serving Size: 1 cocktail
- Calories: 30 kcal
- Sugar: 0 g
- Sodium: 30 mg
- Fat: 0 g
- Saturated Fat: 0 g
- Unsaturated Fat: 0 g
- Trans Fat: 0 g
- Carbohydrates: 4 g
- Fiber: 0 g
- Protein: 0 g
- Cholesterol: 0 mg