1-First Step: Make the blueberry lime syrup Add 1 cup fresh or frozen blueberries, 1 oz lime juice, and 1 tsp lime zest to a small saucepan. Set the pan over medium heat and bring the mixture to a boil. Once it starts bubbling, lower the heat until it is just above a simmer. Keep cooking until the blueberries burst open and the mixture turns deep purple and fragrant. Use a spoon or masher to gently mash the berries as they soften. This helps release more juice and gives the syrup a stronger berry taste. The whole syrup step is quick, and frozen berries work just as well as fresh ones, which is great for year-round mixing.

2-Second Step: Strain the syrup Set a fine mesh strainer over a bowl or measuring cup. Pour the hot blueberry mixture through the strainer and press gently to extract the juice. Discard the solids once the liquid has been strained. You should be left with a smooth blueberry lime syrup that smells bright and fresh. Let the syrup cool before mixing the drink. If you are making the mocktail for later, this syrup can be stored in a jar in the fridge for up to 2 weeks. That makes it a handy little prep item for fast drinks any time.

3-Third Step: Prepare the glasses Fill 2 narrow highball glasses with crushed ice. Using crushed ice is important because it chills the drink quickly and gives it that slushy, refreshing feel. It also makes the drink look extra inviting, especially when you serve it in tall clear glasses. If you want a lighter presentation, you can use smaller ice pieces. But for the classic look and feel, crushed ice works best. This is also a nice trick if you are serving guests and want the drink to stay cold longer.

4-Fourth Step: Shake the cocktail Add 4 oz light coconut milk, 2 oz blueberry lime syrup, 2 oz coconut rum, 2 oz light rum, and 2 oz pineapple juice to a cocktail shaker filled with ice. Put the lid on tightly and shake for 3 to 5 seconds, just until the mixture is chilled. Do not shake too long or the coconut milk may become too frothy. A short shake is enough here because the drink is meant to stay smooth and silky. If you want a non-alcoholic version, swap the rum for coconut water and keep the rest of the recipe the same.

5-Final Step: Strain, garnish, and serve Strain the chilled mixture into the prepared highball glasses over the crushed ice. Then garnish with blueberries, mint, and dried lime slices if desired. The garnish is optional, but it adds a beautiful finish and makes the drink feel special. Serve right away while it is cold and refreshing. The flavor is best when the drink is freshly shaken, and the crushed ice keeps each sip crisp. This is the kind of recipe that feels perfect for sunny afternoons, parties, or anytime you want a tropical treat at home.