Iced tea done cold - cold brew that never turns bitter
Iced tea made from boiling water and ice often comes out bitter, astringent and turns cloudy in the fridge. Yet all you need to do is reverse the process: brew the tea in cold water. Cold-brewed tea is one of the simplest summer tricks - no bitterness, natural sweetness and a clear infusion, and it practically makes itself overnight.
Why cold water works better
The bitterness and astringency in tea come from tannins and caffeine, which hot water extracts quickly and in abundance. Cold water extracts them slowly and gently, while calmly drawing out the sugars and aromas. The result: a sweeter, smoother, less bitter infusion with less caffeine. It is the same principle we cover in why your tea tastes bitter - except here it works in our favour.
How to cold-brew tea
Wonderfully simple, all you need is a jug:
- Put the leaves in cold water - roughly 1 teaspoon of loose-leaf tea per 200-250 ml of water (with cold brew you can use a touch more leaf than for hot, because the brewing is gentle).
- Put it in the fridge for 4-12 hours. Green and white are ready sooner (4-6 h), black and oolong need longer (8-12 h).
- Remove the leaves or strain. Do not leave them in much longer, or the infusion will eventually turn astringent.
- Drink straight from the fridge, or over ice. Sugar is usually unnecessary.
Loose-leaf works better here than bags - it has more room to give up its flavour. We explain why in loose leaf vs tea bags.
Which teas to choose
Almost any tea works for cold brew, but some shine:
- Green (sencha, gunpowder) - fresh, grassy, lightly sweet. A summer classic.
- White - delicate, floral-honeyed, exceptionally smooth cold.
- Oolong - floral or fruity, a very elegant cold brew.
- Black - fuller, lightly sweet; a great base for iced tea with lemon or fruit.
- Fruit and herbal - caffeine-free, naturally sweet, perfect for the evening and for kids.
If you are still getting to know the differences between them, start with types of tea.
Cold brew vs tea over ice
The faster method is to brew the tea stronger while hot and pour it over ice (so-called flash chill) - you get iced tea in minutes, more aromatic and refreshing, but with more bitterness and caffeine. Cold brew is slower but sweeter, smoother and gentler. For a scorching afternoon, flash chill. For a day in the fridge and the evening, cold brew.
Note what worked
Cold-brewed tea is a game of leaf and time, and different teas like different settings. You reach your favourite version fastest when you write it down. In GustoNote you note the type, amount of leaf, time and flavour for every tea, and the aroma wheel suggests words for what you sense. After a few batches you have your own summer recipes - and an end to bitter iced tea from the jug. If you prefer brewing hot instead, the cheat sheet is in how to brew tea.