Keto Blueberry Iced Tea Lemonade

This Keto Blueberry Iced Tea Lemonade is cold, tart, lightly sweet, and full of bright berry-lemon flavor. It’s an easy sugar-free summer drink to keep in the fridge when you want something more fun than plain water or unsweetened iced tea.

This keto iced tea recipe starts with freshly brewed blueberry tea bags, then gets mixed with lemon juice, water, and a low carb sweetener for a refreshing blueberry lemon iced tea. I tested it with Bigelow Wild Blueberry with Acai tea, but any blueberry tea you like will work. If you already have my sugar-free lemonade made, you can use that as the lemonade base and stir it together with the cooled tea.

Why You’ll Love This Keto Iced Tea Recipe

• Cold, fruity, and refreshing: The blueberry tea adds light berry flavor, while the lemon juice keeps it bright and tart.
• Easy to make with tea bags: No bottled tea or drink mix needed.
• Sugar-free and low carb: A low carb sweetener gives you sweet tea lemonade flavor without regular sugar.
• Flexible with different teas: Blueberry is the version I tested, but raspberry, peach, hibiscus, green tea, or black tea work with the same method.
• Great for making ahead: Mix the pitcher, chill it, then pour it over ice when you’re ready to serve.

Ingredients You’ll Need

• Blueberry tea bags: I tested this with Bigelow Wild Blueberry with Acai, but any blueberry tea bags will work. Use herbal blueberry tea for a caffeine-free drink, or black/green blueberry tea for more classic iced tea flavor.
• Boiling water: This is for steeping the tea. Follow your tea package directions, but 5–8 minutes works well for many herbal teas.
• Cold water: This helps turn the lemon juice and sweetener into a quick sugar-free lemonade base.
• Lemon juice: Fresh lemon juice gives the brightest flavor, but bottled works when you need this to be quick.
• Granular sweetener: Start with 1 cup, then add up to ½ cup more after the drink is mixed. This keeps the pitcher from getting too sweet before you know how the tea and lemon taste together.
• Sliced lemon: Adds fresh lemon flavor and makes the pitcher look finished.
• Ice: Add it right before serving, especially if you’re making this ahead.
• Optional frozen blueberries: They work like little ice cubes and add light berry flavor as they thaw.
• Optional fresh mint: Nice when you want each glass to taste a little fresher.

Best Tea to Use

Blueberry herbal tea is my favorite for this recipe because it gives the drink berry flavor without adding juice or syrup. It also keeps the drink caffeine-free.

If you want a stronger iced tea flavor, use black tea. If you want something lighter, use green tea. Raspberry, peach, hibiscus, or pomegranate tea also work well with the lemon base.

The simple formula is:

brewed tea + sugar-free lemonade base + ice

Once you have that, you can change the tea flavor without changing the whole recipe.

How to Make Keto Blueberry Iced Tea Lemonade

Brew the Tea

Add the blueberry tea bags to boiling water and steep them for 5–8 minutes, or according to the package directions. Remove the tea bags, then let the tea cool for about 15 minutes. The tea does not need to be ice cold, but it should be cool enough that it will not immediately melt the ice.

Make the Lemonade Base

In a large pitcher, stir together the cold water, lemon juice, and 1 cup of sweetener until the sweetener dissolves. Start with 1 cup instead of the full amount. Some lemons are more tart, some sweeteners taste stronger, and the tea adds its own flavor once mixed in.

Mix, Taste, and Chill

Pour the cooled blueberry tea into the pitcher with the lemonade base. Add the sliced lemon and stir well. Taste the drink. Add up to ½ cup more sweetener if you want it sweeter. Chill it in the refrigerator, or serve it right away over ice.

Tips for the Best Sugar-Free Iced Tea Lemonade

• Do not over-steep the tea: This keeps the drink from tasting bitter.
• Let the tea cool before mixing: Hot tea melts ice quickly and can water down the drink.
• Sweeten in stages: Start with 1 cup, then add more only after the tea and lemonade are mixed.
• Add ice when serving: If you’re making this ahead, store the pitcher without ice so the drink stays strong.
• Use frozen blueberries for serving: They help keep the drink cold and add a little berry flavor as they thaw.
• Adjust the flavor to fit you: Add more lemon juice for a tarter drink, more sweetener for a sweeter one, or stronger brewed tea for more tea flavor.

Easy Flavor Variations

• Raspberry lemon iced tea: Use raspberry tea for a sweet-tart berry version.
• Peach lemon iced tea: Use peach tea or peach green tea for a softer, fruitier drink.
• Hibiscus lemon iced tea: Use hibiscus tea for a bold, tart drink with a deep pink-red color.
• Classic keto iced tea lemonade: Use black tea instead of blueberry tea for a more traditional tea-and-lemonade flavor.
• Sparkling iced tea lemonade: Pour the finished drink over ice, then top each glass with sparkling water right before serving.

When to Serve It

This low carb iced tea lemonade is perfect for summer meals, cookouts, grilled chicken, seafood, salads, and backyard dinners. If you’re planning a warm-weather menu, it pairs naturally with recipes from my Keto Low Carb Grilling Recipes collection.

For another fruity drink, try my Keto Strawberry Lemonade Smoothie. And, if you love the blueberry-lemon flavor in this drink, my Keto Lemon Blueberry Cheesecake Bites are a great summer dessert to make with it.

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