Consider storing your coffee like your store other perishable food for as short a time as possible in your refrigerator.
Cold brew coffee room temperature or refrigerator.
Even so you ll need more than just 8 hours to cold brew a good cup of coffee.
That being said coffee brewed in the fridge at a very low temp will need those 8 hours to release all the caffeine.
Can you store cold brew at room temperature.
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If you wish to steep your cold coffee brew in the fridge then the steep time increases to 12 24 hours as cold temperatures will slow down the extraction of the coffee from the beans.
Fridge brewing will take considerably longer to extract but there shouldn t be any difference in flavor.
An essential rule of thumb to remember if you will brew your cold coffee at room temperature then a steep time of 8 12 hours is enough.
If you store it in a refrigerator your coffee will probably hold for 1 2 weeks at least.
Please do not store your finished cold brew on the shelf.
But in short cold brew coffee can go bad and if you store it at room temperature it will go bad pretty fast.
I have a filtron cold brewer and i let it brew for 16 18 hours at room temperature with an extremely coarse grind.
At room temp though the 4 hours might be enough.
Room temp sounds like a good way to grow bacteria.
Cold brew is one of the hardest things to mess up if you ask me so i would just brew it room temperature.