Use full-fat milk, low fat or skimmed tastes terrible for this tea! And do not add water - all gone!
Use good quality tea powder - I always prefer Red Label or Eastea, for its smell and thickness.
Since the milk gets boiled till the tea becomes strong, add more milk, if you want more tea - one mug of milk would give you around half a mug of tea.
You may flavor the tea with cardamom or cloves or ginger - your choice... but the tea tastes good as is, without any additionals!