Hello everyone!
I am new distiller for a very small distillery. I am new ish to distilling, and still trying to get my bearings on what I am doing.
I am really struggling with getting complete starch conversion for my corn mash. My current cook recipe is cook 200 LB of yellow corn at 190 for 1.5 hours, add Lallemand AA and mix for another 30 minutes, then add 50 LB 2 row barley malt, and hold at 150 ish for about an hour. By my math that should be enough time, malt, and enzymes to help break down all the corn, but I cant seem to get complete conversions of the sugar, because even at an extra hour, I end up with a 6.0% beer, and the iodine test continues to show blue. I tried upping my barley to 100 LB and I ended up with a faster conversion, but it was maxing out around 6% as well, and I feel like I am wasting a lot of extra cash, and losing flavor, using that much malt compared to what I think I should be getting.
To add an extra step to this, I usually start with 80 gallons of water, and I use an indeterminant amount to lower the temp from the 180 ish I add the AA, to bump the temp down to 150.
Thank you guys so much, I feel like I am going insane.