Wash the lemons thoroughly before cutting them in half. Juice them using a citrus juicer until you have about one and a half cups of fresh juice. Remove any seeds and strain if you prefer a smoother lemonade.
Pour one cup of water into a small saucepan and add the sugar. Heat over medium heat while stirring until the sugar completely dissolves. Remove from the heat and allow the syrup to cool slightly.
Pour the fresh lemon juice into a large pitcher. Add the cooled simple syrup followed by the cold water. Stir everything together thoroughly so the flavors blend evenly.
Give the lemonade a quick taste before serving. If you prefer it sweeter, stir in a little more syrup. If you enjoy a stronger citrus flavor, simply add a bit more fresh lemon juice.
Place the pitcher in the refrigerator for at least thirty minutes. Chilling allows the flavors to combine and creates a much more refreshing drink.
Fill serving glasses with ice cubes before pouring in the lemonade. Garnish each glass with fresh lemon slices and mint leaves for a beautiful presentation and extra freshness.