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Bright blue coconut lagoon soda in a clear glass with ice, fizzy bubbles, and a lime garnish on a pastel tropical background.
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Blue Coconut Lagoon Soda

This Blue Coconut Lagoon Soda is a vibrant, ocean-blue fizzy drink with tropical coconut flavor, a splash of citrus, and an optional caffeine boost. It’s refreshing, playful, and perfect for summer afternoons, beach-themed parties, or a fun pick-me-up that still feels dreamy and indulgent.
Course Beverage, Drink, Non-Alcoholic Drink, Soda
Cuisine American, Island-Inspired, Tropical
Keyword blue coconut soda, blue lagoon soda, caffeinated soda option, coconut simple syrup soda, coconut soda, fun party drink, homemade soda recipe, lagoon soda, mermaid drink, non alcoholic blue curaçao soda, summer soda recipe, tropical blue drink
Prep Time 5 minutes
Cook Time 5 minutes
Total Time 10 minutes
Servings 1 tall glass
Calories 165kcal
Cost $1.20 per glass

Equipment

  • Small saucepan
  • measuring cups
  • Measuring spoons
  • Tall 16-ounce glass
  • Spoon or drink stirrer
  • Stove or cooktop

Ingredients

Coconut Simple Syrup

  • ½ cup granulated sugar
  • ½ cup water
  • ½ teaspoon coconut extract

Soda

  • 2 tablespoons coconut simple syrup
  • 1½ tablespoons blue curaçao syrup non-alcoholic
  • 1 tablespoon fresh lime juice
  • 1 to 1¼ cups chilled lemon-lime soda or sparkling water
  • Ice

Optional Caffeination (Choose one)

  • 25–50 mg liquid caffeine drops about ¼–½ teaspoon, brand-dependent
  • ⅛ teaspoon powdered caffeine food-grade, unflavored
  • ¼ cup chilled matcha lemonade or green coffee extract

Optional Garnish

  • Lime wheel
  • Maraschino cherry
  • Toasted coconut flakes

Instructions

  • Combine the sugar and water in a small saucepan and heat over medium, stirring, until the sugar is completely dissolved.
  • Remove the saucepan from heat, stir in the coconut extract, and allow the syrup to cool completely.
  • Fill a tall 16-ounce glass with ice.
  • Pour 1 ounce of coconut simple syrup over the ice.
  • Add the blue curaçao syrup and fresh lime juice to the glass.
  • Top with chilled lemon-lime soda or sparkling water.
  • Add your chosen optional caffeinated ingredient, if using.
  • Gently stir until the drink is evenly mixed and lagoon-blue in color.
  • Garnish if desired and serve immediately.

Notes

  • Use non-alcoholic blue curaçao syrup to keep this soda family-friendly.
  • Coconut extracts vary in strength; start with the listed amount and adjust to taste.
  • For a lighter, café-style drink, choose sparkling water instead of lemon-lime soda.
  • If adding caffeine, always measure carefully and label caffeinated drinks clearly.
  • The coconut simple syrup can be made ahead and stored refrigerated for up to 2 weeks.
  • For a layered lagoon effect, add soda last and stir very gently.
  • Crushed ice melts faster and slightly softens the sweetness of the drink.