If you dont have a juicer that will handle ginger, this is a great way to extract the maximum flavor without diminishing the heat.
How do you normally juice ginger, if there is an easy way, then yes, add it right to the sugar-water mixture.
Rule of thumb, the more heat applied to any food, the more the flavors break down and dissipate, so the 6 minute boil is an attempt to extract as much flavor as possible from shredded / chopped ginger without cooking off the flavor and heat.
Im just kegging a 5 gallon batch today that turned out beyond amazing, my guests go through this so fast I have had to start making 5 at a time, and I dont worry about bottle bombs when its kegged. I cold crash it at 1.020 and have not needed to use any sorbate to stop further sugar conversion, the combo of the keg, the cold and the pressure pretty much keeps the SG around 1.020
One last thing, I save the strained chopped ginger/lemon grass and put them in dry hop bags inside a ziploc in the freezer, and if I want to add more flavor after fermentation, I toss the bag into the keg. I have also had great success doing the exact same thing to a few batches of beer that did not meet my expectations, so I lightly flavored the finished beer with the leftover ginger mix.
This latest 5 gallon batch was made with Wyeast 3056, which added a lovely clove and banana aroma to the mix!
Checking in after a long break. Lots of questions I'll try to answer in a less than timely fashion obviously. But bembel is pretty much right on across the board in the above post.
One thing I've been playing with lately is adding the ginger minutes after flame out, for 10ish minutes. A couple benefits to this approach - less temp means less gingerol conversion to zingerone. Gingerols/shoagols in raw ginger provide that raw, pungent flavor while zingerone is that more cooked, mellow/softer flavor. Adding my ginger juice/bag at around 190ish preserves some of the gingerol taste. Full boil, at whatever interval, seems to covert almost all to zingerone, which is delicious but not as full a ginger flavor as possible, IMO. 6 min for a boil is fine and delicious as well.
Regarding sweetness for best taste - yes 1.015 - 1.020 taste best to my palate. This also seems to make the best mixed drinks. If you like it more like Crabbies or commercial ginger beers, even higher, up to 1.025. Yes, in the summer this can result in very short ferments. Which is a good thing!
As for the idea of fermenting dry and backsweetening, that's never worked for me. Bad news, I know. It always tastes diet-y/crappy when backsweetened (with simple syrup) for some reason. A cidery who I respect very much just released a completely dry ginger perry, and unless I got a bad batch (entirely possible), its taste has validated my suspicion that ginger beer is much, much better when moderately sweet. I couldn't even backsweeten that though to get a better taste. Best to start over, and if you're aiming for Fentiman's level of sweetness, I'd guess 1.023-5. It's pretty sweet.
Re: dialing in carbonation in bottles. It bears repeating: always use at least one plastic bottle as an indicator. Fill a couple inches low, squeeze out air. When that's firm (usually 2 days at 70 degrees, less for 75, some times one day at 80 in my house in the summer), add to the (cold) fridge and keep it there. Also, make sure the fridge is in the 30's. If you see bubbles in the top of the plastic bottle's liquid after a few days, it's not cold enough. A handtowel draped over the top of an overcarbed bottle when opening will prevent much cursing as well.
Re: juicing/blending, I've never tried juicing ginger, but it seems like it'd be a pain, especially as I don't own a juicer. I ended up getting a Vitamix blender, and I can kill about 700 g of ginger with 40 oz of water in 30 sec. I'll let that rest ~ 10 min so the super fine white elasticy crap settles a little, then pour off all but the white crap into my hop bag/pitcher before adding to the cooked syrup.
So yes, in summary the trick lately for the Alcoholic ginger beer is to get the OG right (1.05ish), time the ginger addition a few minutes after flame out, steep for 10-15 min. Cold crash at 1.020+ for sweet, 1.015 slightly less sweet, 1.010 bare minimum. Under 1.010 the taste goes to **** for some reason I have yet to figure.
Love the other yeast ideas. I've been wanting to try something along those lines. I'm also finally going to kegerate my refrigerator, which is long overdue. Any recommendations for best PSI for 1.015-1.020 ginger beer?
You mention above a 15 min boil, but now you found to add the ginger in a hop bag for final 6 minutes. What is the 15 min boil then if the ginger goes in for the final 6, is this an additional amount added to the original?
And what are your best to date ginger/sugar/citrus amounts?
Many thanks for all the info and efforts!
I had meant the last 6 of the 15 min. The 15 minutes is to sanitize the water/sugar syrup... Super important to cook the full 15 min for beer, less important for ginger beer, which won't bottle ferment for weeks in a cellar somewhere. But if you did 15 regular min and then 6 for the ginger, there'd be zero difference.
I've dialed down my citrus substantially with the under-boiled ginger. 1/2 a lemon zest added to the boil, equal parts lemon/lime after cool down. I'm down to 1/4 cup total citrus at this point. For ginger, you get diminishing returns over ~2 lbs for a 5 gallon batch. So I use about 2.5 lbs these days. For Sugar, whatever gets to 1.050, which is ~4 lbs for 5 gallons. I like to vary the mix between raw and cane to total 4 lbs.
Hope this helps. Cheers all. Great to see this thread so active recently.