So what is the mash temp of corn and oats vs. barley? Could I hit the temps of the oats/corn and then add the barley and amylase once the temp drops? Assuming I am understanding things correctly to begin with...? Lol
I was hoping to start out with 60% barley, 20% corn and 20% oats, if you think that's do-able? Or any suggestions on how I should change that?
That’s a lot of oats. Even 10% would be a lot. I think it would be reasonable to use 70/20/10, Thats still a lot of oats, but with the corn you may be able to get away with it. I’ve always used flaked/torrified adjuncts so I could skip the cereal mash, so I’m not sure what the cereal mash temp is, but if it was me, I would cook them like you normally would rolled oats or stone ground grits. When you cook those porridges to eat, you are doing a cereal mash to make the starches available to your body.
Then cool the cereal mash down and mash the corn and oat mixture with the barley. You don’t have to add amylase, it is already in malted barley. 99% of beer information focuses on using malted barley as the source of amylase. If you used unmalted barley, you would have to use an amylase product. I can’t advise you on which amylase product to use and how. I have never used them. Malted barley is so available, convenient and a cheap source of amylase, the only reason I wouldn’t use it is if I wanted to make a gluten free beer. Or perhaps if these products were coming from my own farm in which case I would learn how to malt barley myself.
You should heat the water before you put in your grains, so bring it up to 160 degrees or so and then add the water to the grains or the grains to the water. Mash the barley, corn and oats at 150 degrees, but for your first time just shoot for anywhere between 145-155 degrees. The higher temp will arguably leave more unfermentable sugars in your wort leaving more body and residual sweetness and the lower temps should convert more to simple sugars that will ferment away and give you a dryer beer.
Measure your temp in the middle of your kettle while mixing your wort a little. If you over-shoot your temp a few ice cubes will bring it into line quickly. Mashing for 1 hour is a good place to start. You can use test strips to see if all the starch has been converted, but I’ve never done that. I just taste it and if its super sweet, I figure I’m good. Besides the Brülosophy guys have done a lot of short mash time exBeeriments and found them to be adequate as quickly as 15 minutes, but for you with all the adjuncts, I wouldn’t mash for less than an hour.
After the hour bring the temp higher than 170 degrees for 10 minutes to denature the amylase that way if you choose to sparge the wort will not continue conversion during your sparge.
Sparge, then remove your grains and bring the sweet wort up to a boil, add hops boil 60 minutes at 15 minutes put in a pinch of Irish moss if you want. Add more hops at the end for flavor and aroma.