01 - Rinse dandelion petals thoroughly in cold water and gently pat dry with a clean towel.
02 - Place dandelion petals in a heatproof bowl. Pour 2 cups of boiling water over the petals, cover, and let steep for 10 minutes.
03 - Strain the dandelion infusion through a fine mesh sieve, discarding the petals. Let the liquid cool slightly.
04 - In a large pitcher, combine the dandelion infusion, freshly squeezed lemon juice, and sweetener. Stir until the sweetener is fully dissolved.
05 - Add the remaining 3 cups of cold water. Taste and adjust sweetness as desired.
06 - Chill in the refrigerator for at least 1 hour before serving.
07 - Serve over ice, garnished with lemon slices and extra dandelion petals if desired.