As an extract brewer slowly making the transition to all-grain I have been reading up on boil times for a lot of all-grain recipes which, depending on the grain bill, are boiled for 90 minutes to drive off DMS.
However, is this necessary for Partial Mashing as well? I have searched a lot of threads and some say Yes and some say No and there doesn't seem to be a consensus. I realize it would be simpler to just boil for 90 minutes to be safe though my propane budget would appreciate more clarification.
Specifically with the following grain bill:
Pale DME 4.47lbs
Munich type 1 (10L) 5 lbs.
Crystal 40L .75 lbs
Crystal 80L .5 lbs
Black malt 1 oz
Mash 6.3 quarts 165* 45-60 mins
Rinse 1 gal 180*
Add water to get 7 gallons
Can anyone please clarify for me?