Start with a small refrigerated batch, a measured leaf-to-water ratio and a tea sold for cold preparation. Cold brewing needs time and planning; it is not a way to make ordinary tea caffeine-free.
Set the ratio before the clock
For suitable loose-leaf tea, TeaVivre gives 1 g of leaf per 100–150 mL of water. That range is a useful starting point, not a promise that every green, white or oolong tea will taste balanced at the same strength. Use a scale and the amount of water actually added; the container’s advertised capacity is not the recipe volume.
| Water added | Leaf at 1 g / 150 mL | Leaf at 1 g / 100 mL |
|---|---|---|
| 500 mL | 3.3 g | 5 g |
| 750 mL | 5 g | 7.5 g |
| 1 L | 6.7 g | 10 g |
These are calculated quantities from the merchant’s ratio. For the first batch, choose one end of the range and write it down. Changing both leaf and time makes the next adjustment harder to interpret.
Make one small, covered batch
- Check the product directions. Use tea intended for cold preparation. If its instructions require boiling water, use the hot-brewed iced method instead. This routine is for tea leaves, not an all-purpose recipe for dried flowers or fruit.
- Prepare a clean vessel. Use a covered food-safe container, potable water and clean handling tools. Allow room for the leaves and for pouring without spilling.
- Weigh, add water and refrigerate immediately. Keep the covered container at 4°C / 40°F or colder. This guide does not use a counter or sunny-window steep.
- Use the packet’s timing first. If none is supplied for a cold-brew product, four hours can be an editorial tasting checkpoint, not a validated safety limit or guaranteed finish. Pour a small sample into a clean cup rather than drinking from the batch.
- Strain when the flavor suits you. Remove the leaves, keep the drink covered and refrigerated, and make only what you expect to drink promptly. Record the actual time for your next batch.
Adjust the next batch, not every variable
If the tea is clean but too faint, increase the leaf within the stated range before trying an indefinitely longer soak. If it is too concentrated, dilute a poured serving with safe cold water and reduce the next batch’s dose. If it has an unpleasant aftertaste, check the leaf, water and clean container separately; more time is not an automatic cure. A controlled comparison of two drinking waters can help when the same problem appears with several teas.
For fruit or herbal infusions, BfR advises boiling water and at least five minutes. Start those hot and chill them afterward. A customer’s enjoyable cold-soak result does not establish a safe process.
