Go Back Email Link
–+ servings
A homemade key lime soda sits on a wooden cutting board with a small pile of key limes next to the glass, and a bottle of key lime simple syrup in the background.

Key Lime Italian Soda (with Key Lime Syrup)

Lindsey Neumayer
This homemade Italian key lime soda recipe uses key lime simple syrup to create a flavorful, citrusy, and cult-classic soda flavor! Key limes are more floral and less acidic in flavor than regular limes, so it’s the perfect way for the whole family to enjoy citrus season!
5 from 1 vote
Print Recipe Pin Recipe Rate this Recipe
Prep Time 5 minutes
Total Time 5 minutes
Course Beverages, Drinks
Cuisine American, Italian
Servings 1 Soda
Calories 169 kcal

Wanna save this recipe for later? 📬

I'll email this recipe post to you so you can have it for later!

Equipment

Ingredients
  

  • 1 ounce key lime simple syrup up to 2 ounces
  • 8 ounces unflavored sparkling water such as La Croix or Polar Brand
  • ice
  • whipped cream optional
  • key lime for garnish

Instructions
 

  • Add ice. Fill your chosen glass with ice.
  • Pour syrup. Add your key lime simple syrup to the glass.
  • Add bubbles. Add in unflavored soda water to the top of the glass.
  • Top with whipped cream. Top with whipped cream, if desired.
  • Garnish. Garnish with a slice of a fresh key lime, or a dehydrated lime wheel.
  • Serve. Serve immediately with a straw.

Notes

Troubleshooting Tips

  • use the right sparkling water - make sure to use plain soda water, sparkling water, or seltzer water. You can also use club soda in a pinch, but it tends to have a bit of saltiness to it because of added minerals. Avoid using sparkling mineral water or tonic water.
  • start small with the syrup - I like to add just a bit less syrup than I think I’ll need. Start with a half ounce, or 1 TBSP. You can always add more syrup later, but it’s hard to dilute the flavor once it’s added.
  • too sour - if your soda is too sour or acidic, you can use a few drops of a saline solution for drinks to help balance out the tart lime flavor.

Nutrition

Serving: 1sodaCalories: 169kcalCarbohydrates: 29gProtein: 1gFat: 6gSaturated Fat: 4gPolyunsaturated Fat: 0.2gMonounsaturated Fat: 2gCholesterol: 22mgSodium: 50mgPotassium: 47mgFiber: 0.003gSugar: 27gVitamin A: 194IUVitamin C: 0.02mgCalcium: 40mgIron: 0.04mg
Did you make this?! 👀Let everyone know how it was! 💕
Keyword: homemade soda, key lime