I'm doing some one-gallon batches now. Really all it takes using my process is a kettle, a grain bag, a large strainer, a two-gallon bucket with lid and airlock, a one-gallon jug with stopper and airlock, and a mini racking cane. With my first batch behind me, I felt like a total noob but here's how it goes:
- Mash in a bag: Put the grain bag in your kettle and add measured water. Heat to strike temp, add the grains, stir and temper. I found it pretty difficult to maintain constant temperature but that will doubtless improve with time. Heat to mash-out temp (168°) and let stand for a few minutes to denature the enzymes. Do a batch sparge by adding 168° water to make up your boil volume, stir, pull the bag out and let it drain. Here the strainer comes in: One big enough to sit atop the kettle and hold the grains is a godsend to your arms!
- Start the boil. Since I do this on the stovetop, the boil-off rates I get with my propane burner definitely do not apply. For a one-gallon batch, 60-minute boil, I'm targeting 2.0 gallons kettle volume (to give me just over one gallon to the fermenter - I calculated 3 qt/hr boil-off this batch). Again, I'll get this dialed in over time - first batch took me 140 minutes to boil down and I still had too much, too thin wort!
- Cool and transfer to a sanitized 2-gallon bucket. Pitch yeast (I just use an entire vial, although it's way too much). Cover and allow to ferment.
- Rack to 1-gallon glass jug (sanitized), stopper and let secondary fermentation go.
- Bottle using bottling tabs, the racking cane and the bottling attachment. Cap and let stand.
I'll publish, with pictures, to the blog in a few days. It's a new adventure, almost like learning to brew all over again. My reason for micro brews is to test new recipe ideas and processes before scaling up to 5 gallons. For this batch, I sour-mashed by pitching lacto into the wort and letting it stand in the kettle (which will be sterilized!) overnight.
Cheers!