A traditional North Indian cold drink made with soaked nuts, seeds, and whole spices blended into a fragrant milk base. Make the thandai syrup up to 5 days ahead and assemble glasses in minutes.
Combine almonds, cashews, melon seeds, poppy seeds, and pistachios in a bowl.
Cover with water and soak for at least 4 hours, or overnight for the smoothest, creamiest result.
Drain and rinse before blending.
Make the Thandai Paste
Add the drained nuts and seeds to a blender with the fennel seeds, cardamom seeds, black peppercorns, dried rose petals, sugar, and saffron-soaked milk.
Blend on high for 2 minutes until smooth.
Add 2-3 tablespoons of cold water or milk to loosen if needed, then blend again until completely smooth.
Transfer to a clean jar with a lid. The paste keeps in the refrigerator for up to 5 days.
Assemble and Serve
Stir 2 tablespoons of thandai paste into 1 cup of cold milk until fully dissolved.
Add sugar or rose syrup to taste.
Pour over ice and garnish with chopped pistachios, dried rose petals, and saffron strands.
Serve immediately, very cold.
Notes
Overnight soaking gives the smoothest, most flavourful paste with no graininess — worth the extra time.Make-ahead syrup: Scale the paste recipe by 3 or 4 and store in a sealed jar in the fridge for up to 5 days. Stir before each use as the paste settles.Vegan version: Replace whole milk with full-fat oat milk or cashew milk. Almond milk is too thin. Use warm oat milk for the saffron soak too.For a sweeter concentrate, blend 4-5 tablespoons of sugar into the paste so glasses need no extra sweetening.Storage: Assembled thandai is best same day. The paste (syrup) keeps refrigerated in a sealed jar for up to 5 days.