This week on Brew
Masters Disasters: Julian Shrago’s Laurel India pale ale.
Well, there’s trouble in Laurel Land. We really screwed the mash temperature and may have to throw the whole batch down the drain. Tens of dollars could be lost.
According to Wikipedia, mashing is the process of combining a mix of milled grain (typically malted barley with supplementary grains)… and [heated] water. Mashing allows the enzymes in the malt to break down the starch in the grain into sugars, typically maltose to create a malty liquid called wort.
Depending on the temperature, certain enzymes will be activated which will break down starches into sugars. The higher the temperate, the greater the non-fermentable sugars (top end 156), which will give the beer a sweeter taste with more mouthfeel. The lower range releases more fermentable sugars for a drier taste (low end 148). There are temperatures that are too low which will not activate any enzymes. There are temperatures that are too high that will denature enzymes.
My desired mash temperature was 151°F. I heated my water to 161°F. My expectation was that when I added the grain to the hundred and 61°F water it would drop about 10°F and give me my desired mashing temperature of 151°F. Instead, it dropped to 144°F when I added my grain. To low. Since I mash in converted cakes I decided to try slowly heating the mash to reach 1 51°F. I used a very low flame and monitored the change in temperature every 3 min.
I use a Taylor 9842 Commercial Waterproof Digital Thermometer to get my readings by poking it into the porridge-like mixture. I checked it didn’t seem to be raising much and in fact the temperature would peak and then begin to drop on my digital thermometer. I set my timer for another three minutes and checked my mash temperature after the timer went off. Well, lo and behold, my mash was now at 175°F, high enough to denature the grain’s enzymes. Oh crap! I added some cool water and brought it down a little not below 171°F. I added a little more cool water and finally I was able to get it down to 151°F. Then, the mash rested for an hour.
I continued on because as Charlie Papazian advises, “Relax, don’t worry, have a homebrew.”
I did a 90 minute boil and added hops according to the recipe, and pitched the yeast at 3:30pm. Fermentation had started by 5:30pm. I have my fingers crossed that it is good yeast-caused fermentation and not from lactobacillus or pediococcus.
THE LAUREL IPA
– 5 gallon batch at 75% efficiency –
* 11.5 lbs. American 2-row malt
* 0.4 lbs. Carapils malt
* 0.3 lbs. Crystal 40 malt
Mash @ 151 degrees Fahrenheit for one hour.
90 minute boil
* 0.8 oz. Amarillo pellets (9.6% AA) for first wort hop (FWH)
* 0.55 oz. Summit pellets (18% AA) for 60 minutes
* 0.75 oz. Centennial pellets (9.2% AA) for 30 minutes
* 0.3 oz. each Simcoe (12.2) and Columbus pellets (14.0) for 10 minutes
* 0.5 oz. Amarillo pellets (9.6% AA) at flameout/whirlpool
* Dry hops: 1.3oz each Amarillo, Centennial, and Summit pellets for two weeks
Ferment with White Labs California Ale Yeast WLP001 or Wyeast 1056
Note: I subbed Zythos hops for the amarillo hops.
- Not so great fermentations. How not to mash. (52beers.wordpress.com)
- Behind the scenes at the Samuel Adams brewery (news.cnet.com)
- Bottling the latest India Pale Ale… a Hop Grenade (52beers.wordpress.com)
- This week on Brew Disasters: House Pale Ale (52beers.wordpress.com)
- Laurel IPA – The Tasting (52beers.wordpress.com)
- Bottling the Laurel IPA (52beers.wordpress.com)
- When Good Beer Goes to the Butter Side (palatejack.wordpress.com)