01 - Combine sugar and 1/2 cup water in a small saucepan. Heat over medium heat, stirring constantly until sugar completely dissolves. Remove from heat and allow to cool to room temperature.
02 - Pour freshly squeezed blood orange juice and lemon juice into a large pitcher. Mix thoroughly to ensure even distribution of flavors.
03 - Pour the cooled sugar syrup into the citrus mixture. Stir well until fully incorporated.
04 - Add cold water or sparkling water to the pitcher. Stir to combine all ingredients evenly.
05 - Taste the lemonade and adjust sweetness or acidity as desired. Add more sugar syrup for sweetness or additional citrus juice for tartness.
06 - Fill glasses with ice cubes. Pour lemonade over ice. Garnish with blood orange slices, lemon wheels, and fresh mint leaves if using. Serve immediately while cold.