You made a big batch of cold brew. Now your wondering how long it’ll stay good in the fridge. Here’s what you need to know.
Cold Brew Concentrate: 7-10 Days
Undiluted cold brew concentrate stays fresh for about a week in the fridge, sometimes up to two weeks if stored properly. The high coffee-to-water ratio acts as a natural preservative.
Diluted Cold Brew: 2-3 Days
Once you add water or milk to your concentrate, the clock speeds up. Drink diluted cold brew within 2-3 days for the best taste.
Signs Your Cold Brew Has Gone Bad
Cold brew doesnt spoil the way milk does, but it does go stale. Watch for:
- Sour or vinegary smell – the first sign its turning
- Woody, stale taste – lost its smooth character
- Visible mold – rare, but throw it out immediately
How To Store Cold Brew Properly
Maximize freshness with these steps:
- Use an airtight container (mason jars work great)
- Keep it in the back of the fridge where its coldest
- Don’t store it in the door where temperature fluctuates
- Keep it sealed when not pouring
Can You Freeze Cold Brew?
Yes. Cold brew freezes well for up to 2 months. Freeze concentrate in ice cube trays, then transfer to a freezer bag. Thaw in the fridge overnight or drop frozen cubes directly into milk for iced coffee that doesnt get watered down.
Taste Test Before Drinking
When in doubt, take a small sip. If it tastes flat, sour, or off in any way, make a fresh batch. Lifes too short for stale cold brew.