1-First Step: Prep the fruit and herbs Start by washing the watermelon, cucumber, limes, and mint leaves well. Cube the watermelon, making sure it is deseeded, and slice the cucumber. Measure out the mint leaves, lime juice, simple syrup, rum, and club soda so everything is ready. This kind of setup keeps the process smooth and helps the whole recipe move quickly.

2-Second Step: Puree the watermelon and cucumber Add the 12 cups of cubed watermelon and the whole sliced cucumber to a blender. Puree until the mixture looks smooth and juicy. The goal here is to pull out all that sweet melon flavor and the cooling cucumber taste. If your blender is small, work in batches so it does not overflow.

3-Third Step: Strain the puree Set a fine mesh strainer over a large bowl or pitcher. Pour the blended mixture through the strainer, then press it gently with a spoon or spatula to pull out the liquid. Discard the pulp or save it for another use if you like. You should end up with a bright, smooth juice that becomes the heart of your watermelon mojito recipe.

4-Fourth Step: Blend in the lime and mint Return the strained juice to a clean blender. Add the fresh lime juice and mint leaves, then pulse a few times to mince the mint. Do not overblend here, or the mint can turn too strong and grassy. You want little flecks of mint and a fresh, fragrant flavor running through the drink.

5-Fifth Step: Strain into a pitcher and add the rum Strain the minty mixture into a pitcher to remove any large bits of mint or fruit. Add the 1/2 liter white rum and the 2/3 cup simple syrup. Stir well until everything is fully combined. At this point, the drink base should taste bright, sweet, and balanced, with a gentle kick from the rum.

6-Sixth Step: Chill until serving time Cover the pitcher and refrigerate it until you are ready to serve. This resting time lets the flavors settle together and keeps the base nice and cold. According to the recipe notes, this is a great make-ahead drink, so you can prepare it ahead of time up to this point. If you are planning a party, this step is a lifesaver.

7-Seventh Step: Add the fizz right before serving Just before serving, stir in the club soda or sparkling water along with half of the sliced cucumber. This is the part that gives your refreshing cucumber watermelon mojito its lively sparkle. Add the soda at the last minute so the bubbles stay bright and cheerful instead of going flat.

8-Eighth Step: Pour over ice and garnish Fill each glass with ice, then pour the mojito mixture over the top. Garnish with watermelon slices, mint sprigs, and extra lime wheels if desired. The garnish is not just for looks, either. It adds a fresh scent and makes the drink feel special.