I used 1.5 tablespoons of dry leaf for 400 ml of water.
The black tea is too prominent with the addition of the extra leaf (over 1 tablespoon per 375 ml) and drowns out the other flavours. More astringency comes through and borders on being bitter. Toasted flavour coming through. Bitterness comes through as the tea cools.
Preparation
Boiling
3 min, 45 sec