To prepare a single, comforting mug of hot cocoa: Heat 240 ml (1 cup) of milk in a small saucepan over medium heat for 3-5 minutes until steaming hot, not boiling. Add 30 g (about 3 tablespoons) of the mix to a mug. Pour in 2 tablespoons of hot milk; whisk vigorously 15 seconds for a smooth, thick paste (if lumps persist, continue whisking until fully incorporated). Slowly add the remaining hot milk, whisking constantly for 30 seconds until fully dissolved and frothy on top. Stir in 5 ml (1 tsp) vanilla extract and 2.5 ml (0.5 tsp) rosewater for an aromatic finish, optionally garnished with finely chopped pistachios and dried rose petals. Never skip the salt; it brightens the chocolate flavor remarkably!