Yes, if this mint lemonade is a drink you plan on having repeatedly, then making a mint simple syrup is a great way to batch prepare your lemonade flavoring. That way, you only need a handful of extra mint leaves to add to the final drink while still getting all the flavor. Plus, you can store mint simple syrup in the fridge for between 1-2 months (or in an ice cube tray in the freezer for longer). It's good for more than just mint lemonade, too. Think cocktails, mocktails, and desserts (like over ice cream)! To prepare the mint simple syrup: combine sugar, water, and mint (either chopped or gently "muddled"/crushed) in a 1:1 ratio in volume (1 cup of each, for example). Though you could add a little extra mint for a stronger flavor – up to a 1.5 ratio – i.e. 1 ½ cup mint to 1 cup sugar and 1 cup water. Combine all three in a small saucepan, bring to a gentle boil (stirring constantly to melt the sugar) and simmer for a minute. Then remove from the heat and allow to steep for 20-30 minutes. Then strain the mixture and voila! Bonus tip: You can "candy" the mint leaves after preparing the syrup (works best with whole leaves or roughly chopped). Just lay the pieces out across a tray and either use a dehydrator, the oven with the light on (no heat), or at room temperature, allowing the mint to dehydrate and crisp up.