Beach-Interlude Watermelon Shiso Cooler

Method

1. Wake up the shiso

   

   Set aside one-third of 12 fresh green shiso leaves for serving. Tear the remaining leaves into a wide bowl, add 25 g of granulated sugar, 2 g of lime zest, and 0.75 g of fine sea salt, then press gently with the back of a wooden spoon for 30 to 45 seconds. Stop when the leaves smell vivid and look lightly bruised, not shredded. Stir in 90 ml of fresh lime juice and 120 ml of cold water, then let the mixture stand for 5 minutes.

   05:00StartReset
2. Blend the watermelon

   Cut 900 g of seedless watermelon into blender-friendly chunks. Blend in batches for about 30 seconds each, just until the fruit becomes a smooth, pourable juice with no large pieces remaining. Avoid extended blending, which whips in extra foam.

   00:30StartReset
3. Strain the cooler base

   

   Pour the blended watermelon through a fine-mesh sieve into a large pitcher. Press lightly to collect the juice without forcing thick pulp through. Rinse the sieve, then strain the shiso-lime mixture into the pitcher, pressing the leaves once or twice before discarding them. Stir until the color and flavor are even, then skim off any heavy foam from the surface.

4. Build the sparkling finish

   Divide 600 g of ice cubes among tall glasses and stir the watermelon base once more. Pour the base evenly over the ice, leaving room at the top of each glass. Add 480 ml of chilled sparkling water slowly so the bubbles stay lively, then tuck the reserved shiso leaves at the rims and serve immediately.

Smart Substitutions

• No fresh shiso? Use a small mix of basil and mint, pressing it gently so the flavor stays fresh rather than grassy.
• No sparkling water? Use very cold still water for a softer, juice-like cooler.
• Prefer less sweetness? Start with half the sugar, then adjust the strained base after tasting the watermelon.
• Want a ginger edge? Press a few thin slices of fresh ginger with the shiso, then strain them out with the leaves.

Tips and Variations

• Press the shiso only until fragrant; vigorous muddling or blending can make the drink taste harsh.
• Strain with light pressure for a cleaner cooler that pours easily over ice.
• Add the sparkling water in the glasses, not the pitcher, so each serving keeps its fizz.

What Went Wrong?

• Cooler tastes flat Add fresh lime juice a teaspoon at a time, then check whether one small pinch of salt brings the watermelon forward.
• Drink is too pulpy Pass the base through a clean fine-mesh sieve again without pressing hard on the solids.
• Shiso flavor is too strong Dilute each glass with more sparkling water and add a little extra watermelon base if available.
• Cooler separates in the pitcher Stir gently before pouring; natural watermelon solids settle as the base stands.

Nutrition Estimate

• Fiber: 1 g per serving
• Sodium: 75 mg per serving

Nutrition disclaimer:This recipe is provided for general cooking information only. Nutrition values are estimates and may vary by ingredients, brands, preparation methods, and serving sizes. Check ingredient labels and follow appropriate food-safety practices. This content is not medical, dietary, allergy, or professional food-safety advice.

FAQ