Mashing time

[grnich]

I'm doing a recipe from Beer Captured, and they all seem to say mash for 90 minutes. I've had conversions complete within 60 minutes, so if I do an iodine test and the starch conversion is complete in 60 minutes(or less), is there any reason to mash longer? Are you picking up more color, or flavor, or something?

 

[Brewsmith]

If you find it's done in 60, you're done. With well modified malts, it may be done in 30 minutes.

 

[Orfy]

You might want to startch test the first time but if you do it right it'll work every time. I never test and it works out every time.

The only reason for mashing longer is so you can do other things. If I want to cut my brew day doen to under 3.5 hours I mash for 30 minutes.
If I want to do something else during the day like take SWMBO out shopping and for lunch I'll leave it 4 hours. Some people leave it over night.