Showing posts with label Yeast Starter. Show all posts
Showing posts with label Yeast Starter. Show all posts

Tuesday, June 8, 2010

My first yeast starter, well my second...

You can call me ignorant or stupid, but I have never made a yeast starter in my homebrewing career, well... never made one up until last week. Actually, when I first entered the world of homebrewing no one ever told me that I had to make a yeast starter, I was told just to pitch a vial of White Labs into my 5 gallon batches. Well, that didn't convert to well when I started brewing 10 gallon batches, and many of my beers took a fair amount of time to begin fermenting and were finishing too high in gravity, as well as displaying off flavors.

After listening to Jamil Zainasheff on the Brewing Network I soon discovered that making a yeast starter could dramatically improve the quality of my liquid bread concoctions. So for my first brew, Me So Corny, I decided to try out a yeast starter, and to my surprise making a yeast starter really isn't that hard and it definitely improved the fermentation start-up time. We'll soon know its affects on the flavor and total fermentation time once the beer finishes fermenting. Using the information on Jamil's website and his Mr. Malty Pitching Rate Calculator I was able to calculate the correct amount of yeast starter needed for my next brew, an American Trippel.
Here is exactly what I did...

On his site Jamil says to aim for a target gravity of 1.030 - 1.040, which is about a ratio of 10ml. of water to 1 gram of DME (Dry Malt Extract). For the American Trippel, which has a starting gravity of 1.083, I need a 2000ml. starter. Before I even started my starter I made sure to clean and sanitize everything that would come in contact with the starter. Once I was sure everything was clean and sanitized, I went on preparing the yeast starter.
To meet the target starter amount, I added 2200ml. of water to my brew kettle and brought it up to a gentle boil. Once the water had reached boiling point I added my pre-measured DME, along with a teaspoon of Yeast Nutrients to the kettle and gently boiled for a total of 15 minutes.
At the 15 minute mark I cut the heat and moved the kettle over to the sink where I had an ice bath ready to cool it down to pitching temperature, about 70*F. Once the starter wort was down to the desired temperature I poured it into a spare growler I had laying around and gave it a good shake. After the shaking, I poured my two vials of White Labs WLP530 Abbey Ale Yeast into the starter wort and shook it once more for good measure, then capped the growler with a piece of aluminum foil.I'll let the yeast starter grow at about 70F - 72F.

I do not have a stir plate, so I like to give the yeast a nice gentle swirl every hour, which is recommended by other homebrews who do not have a stir plate. Jamil states, "I like to pitch starters while they're still very active and as soon as the bulk of reproduction is finished, usually within 8 to 18 hours." I pitched my first yeast starter at the 18 hour mark and have had great results thus far, so I plan to do the exact same thing with this batch of brew.