Easy Keto Lemon-Lime Soda Recipe

Breakfast, Vegetarian

March 9, 2026

Craving that crisp, bubbly satisfaction of a lemon-lime soda but want to skip the sugar and artificial junk? You’ve come to the right place! This homemade version is ridiculously easy to whip up, bursting with fresh citrus flavor, and is so much better for you. Get ready to quench your thirst with a sparkling, guilt-free treat that will have you saying goodbye to store-bought sodas for good.

Ingredients

• MAKES: 2 quarts / 1.9L (1 cup per serving) · PREP TIME: 10 minutes
• 1 cup / 192g powdered erythritol
• ½ cup / 120ml fresh lemon juice
• ½ cup / 120ml fresh lime juice
• 1 lemon, cut into slices
• 2 limes, cut into slices
• 6 cups / 1.4L club soda, chilled
• Ice, for serving (optional)
• Fresh mint sprigs, for garnish (optional)

Instructions

1. Directions
2. In a large pitcher, whisk together the powdered erythritol, fresh lemon juice, and fresh lime juice until the erythritol is fully dissolved. Add the lemon and lime slices.
3. Gently pour in the chilled club soda and give it a light stir to combine, being careful to preserve the carbonation.
4. Serve immediately over ice in chilled glasses. Garnish with fresh mint sprigs, if desired.

Nutritional Information

• Nutrition Information
• Per Serving (1 cup)
• CALORIES: 13
• FAT: 0.1g
• PROTEIN: 0.3g
• TOTAL CARBS: 4.2g
• FIBER: 0.6g
• NET CARBS: 3.5g
• ERYTHRITOL: 24g

Pro Tips

• For the coldest, most refreshing soda, ensure your juices, club soda, and even your serving glasses are well-chilled before mixing.
• Make a concentrate by preparing the citrus and erythritol syrup ahead of time. Store it in an airtight container in the fridge for up to a week and just top with club soda when ready to serve.
• Muddle a handful of fresh mint leaves or a few raspberries in the pitcher with the erythritol before adding the juice for an extra layer of flavor.

FAQ

Q: Can I use a different sweetener instead of erythritol
A: This recipe is optimized for powdered erythritol. While you can experiment with other sweeteners like stevia or monk fruit, you will need to adjust the amount to taste, as their sweetness levels differ.

Q: How long does this homemade soda last
A: For the best carbonation, this soda should be served immediately. However, you can prepare the citrus and erythritol syrup concentrate in advance and store it in the fridge for up to a week. Just add chilled club soda when you’re ready to drink.

Q: Is it okay to use bottled lemon and lime juice
A: Freshly squeezed lemon and lime juice is strongly recommended for the brightest, most authentic flavor. Bottled juices can have a different taste and may alter the quality of your homemade soda.

Q: How can I add other flavors to this soda
A: You can easily customize this drink. For a flavorful twist, try muddling a handful of fresh mint leaves or a few raspberries in the pitcher with the erythritol before adding the juice and club soda.

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