Berliner Weiss -Biab - left the grain in .....

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Brewmance

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Hi,

First shot at any type of sour. I totally misinterpreted the instructions and had an "AHA" moment at like 3am.

Basically, I mashed, cooled, added the uncrushed grain and am incubating with the crushed grain I mashed.

Should I have taken it out? will this have an impact? This grain was all of $7, so I'd rather dump then go through the trouble of bottling a funky (bad) beer.

Its going on about 18 hours atm.

Also looking for recommendations on how long to leave it.

Thank you all!

This was the recipe.

Grain Bill (2.50 gallon batch)
2 lbs crushed Wheat Malt (or 3 lbs Wheat LME)
2 lbs crushed Pilsner Malt (or 3 lbs Pils LME)
0.25 lbs UNCRUSHED extra Pilsner/Two-Row Malt for sour inoculation
Hop to taste (traditional BWs have no hops, those that do are very low IBU<10)
Liquid German Ale Yeast (traditional) or S-05 dry yeast

Procedures
1) Mash crushed malts at 146-148F for at least 20 minutes, holding back 0.5 lbs of uncrushed malt. You may find it useful to complete this step with a smaller pot at a 1.0-1.25 qt/lb grist ratio to make it easier to handle (especially BIAB brewers that would typically use full water volume).

2) After 20 minute mash, cool to 110F, add the 0.5 lbs of uncrushed malt to the mash and stir it in.

3) Cover the mash with cling wrap, etc. If possible, purge the O2 from between the grain bed and the cling wrap. Easy way to do this is take the gas disconnect off your CO2 tank, put the tube under the cling wrap, allowing space for O2 to escape, and open your CO2 tank for a couple seconds.

4) You’ll need a method to maintain the temp at about 90-120F for 2-4 days. The higher the temp in this range, the faster it will sour. A couple suggestions:

a. A 40 watt light bulb will maintain a 100-110F temp in an insulated cooler/closed fermentation chamber, or even in the oven with just the internal oven light on. Wrap the pot in a towel to help insulation.

b. Space heater in an interior closet/bathroom. Make sure you do this in a way that will be safe for 2-4 days, and not a fire hazard!

c. Keep the bottom/sides in contact with a heating pad, wrapping the pot in towels/blanket. Make sure you do this in a way that will be safe for 2-4 days, and not a fire hazard!


5) At 100F, you should get a light sour in 2 days, moderate sour in 3 days, and prominent sour in 4 days. Taste the mash in about 8 hour intervals throughout to test sour levels to your personal tastes, being careful to maintain the CO2 blanket (repeat O2 purge, if necessary). Remember that you will add water to get to your full volume, diluting the sour level, so plan accordingly.

6) Once you have your desired sour level, complete your brew day as normal. The boil will stop the souring process by killing the lactobacillus, and lock in the sour profile of the existing lactic acid.

7) Cool/Pitch/Ferment as normal.
 

Amadeo38

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This method has a higher chance of making a funky/bad beer in general due to the higher chances of a variety of bugs existing on the unmilled grains used for souring. I’ve not done this method for that reason, but as far as I can tell, you’re doing it according to instruction and all is well. I find it strange that they have you leaving the crushed grains in the mash along with your inoculating grains. Long mashes like this can lead to poor head retention, among other problems at times. I would have mashed out and put the unmilled grains in a grain bag inside my 100F wort, but that’s just me.

Anyway, like it says in the instructions, you’ll leave it at 100F for up to four days, depending on your desired sour level. Remember not to drink too much of the soured wort when you taste, and that it won’t be super sour since the sugar is still present as it is unfermented. I think they say it should taste like apple juice.
 
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Brewmance

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Ok, so potential to be decent. Which is fine seeing as this is my first go. Awesome feedback, really appreciate it!
 
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