Soak the almonds in hot water for 30 minutes. Once they are soft, peel off the skin and set them aside.
Take a pressure cooker and add almonds, cashews, raisins/kishmish, whole white peppers / dakhni mirch, poppy seeds white / khus khus, musk melon seeds, crushed small cardamom seeds, and black cardamom seeds (crushed).
Add water and cover the lid of the pressure cooker.
Now cook on high flame for a whistle.
Once the pressure has naturally released, open the lid.
Let the mixture cool down to room temperature.
After cooling, transfer the cooked ingredients to a blender.
Add ½ cup Sugar (adjust as per your taste), cover it, and grind it into a smooth paste.
Strain the blended mixture into a bowl to remove coarse particles, ensuring a smooth Thandai.
Add 2 cups of milk and strain the mixture properly in the straining process.
Now add the remaining 6 cups of milk and mix well.
Refrigerate the Thandai for at least an hour. Add 2 cups of ice cubes and mix well. Chilled Thandai is more refreshing and enhances the flavor.