Finely grate the colored zest from the citrus into sugar. Rub together until fragrant.
Add hot water and stir to dissolve sugar. Squeeze the citrus, strain out seeds and stir the juice into the syrup. Strain the mixture and add cold water.
Cover and refrigerate for 1–2 hours. Taste and add cold water if too strong.
Add mint just before serving over ice. Keep refrigerated and use within 2–3 days for best quality.
Cooking guidance
Rub only the colored zest into sugar; white pith adds bitterness. Citrus size and acidity vary, so adjust the final dilution to taste.
A warm spice infusion with galangal, ginger, cinnamon and cloves, topped with walnuts. In Adana, kaynar is associated with visits celebrating a new baby. That cultural association does not establish a medical or lactation benefit; this is a culinary serving recipe.