Place fresh raspberries in a muddler or a sturdy glass and gently crush them, feeling the squishy pop as their juice begins to flow and turn a deep purple.
Hold a lemon over the muddled berries and squeeze firmly, catching all the juice and pith into the mixture. The aroma of citrus will fill the air as you do this.
Add granulated sugar to the berry and lemon mixture, then stir with a spoon until the sugar dissolves completely, creating a slightly cloudy, tangy syrup.
Pour in cold water and stir well to combine everything into a vibrant, bubbly liquid. If desired, add a few mint leaves for extra freshness.
Strain the mixture through a fine mesh sieve into a pitcher to remove seeds and pulp, resulting in a smooth, bright red beverage.
Fill glasses with ice cubes and pour the freshly made raspberry lemonade over the top, watching the color brighten and the drink chill.
Garnish with extra raspberries, lemon slices, or mint leaves if desired, then serve immediately for a refreshing, summery treat.
