Step 1: Prepare the simple syrup. In a medium saucepan, combine 1 cup of granulated sugar with 1 cup of filtered water. Heat over medium heat, stirring constantly, until the sugar is completely dissolved. Do not boil vigorously; just enough to dissolve the sugar. Once dissolved, remove from heat and let it cool completely to room temperature.
Step 2: Juice your lemons. You'll need about 6-8 large, fresh lemons to get 1 to 1.5 cups of fresh lemon juice. Roll the lemons firmly on a counter before cutting them in half. Use a citrus juicer (manual or electric) to extract as much juice as possible. Strain the fresh lemon juice through a fine-mesh sieve to remove any pulp and seeds.
Step 3: Combine ingredients. In a large pitcher, combine the cooled simple syrup, the strained fresh lemon juice, and 4 cups of cold filtered water. Stir well to ensure all components are thoroughly mixed.
Step 4: Taste and adjust. Taste a small amount of your lemonade. If you prefer it sweeter, add more simple syrup. If it's too sweet, add a splash more fresh lemon juice or cold water. Adjust to your desired sweet-tart balance.
Step 5: Chill thoroughly. For the best flavor and refreshment, transfer the pitcher to the refrigerator and chill for at least 1-2 hours. This allows the flavors to meld and ensures your lemonade is perfectly cold.
Step 6: Serve and enjoy. Fill glasses with ice cubes. Pour the chilled lemonade over the ice. Garnish with fresh lemon slices, mint sprigs, or berries if desired. Enjoy your refreshing homemade lemonade!