The result was a very strong coffee concentrate that was mixed with milk and sweetened.
iced coffee drinks
Many coffee retailers simply use hot-brewed coffee in their iced coffee drinks.
specifically
Glee specifically uses the double-strength method in which the coffee is brewed hot with twice the amount of grounds.
cold brew
Iced coffee is a type of coffee beverage served chilled, brewed variously with the fundamental division being cold brew
different flavours
brewing the coffee cold, yielding a different flavour, and not requiring cooling – or brewing normally (hot) and then cooling
before cooling
generally by simply pouring over ice or into ice cold milk. In hot brewing, sweeteners and flavourings are often mixed into the hot coffee before cooling
