Bourbon, Whiskey, Vodka and Moonshine - How Much Yeast?

This blog provides information for educational purposes only. Read our complete summary for more info.

We get a lot of questions about yeast. Everyone seems to want to know how much yeast is needed for making 5 or 10 gallons of mash. For those that have read The Best Yeasts for Distilling, it's obvious we are very fond of bread yeast. We have found over the years that bread yeast can easily produce as much alcohol as other yeasts if used correctly.

The question we hear a lot is "How much yeast do I need for the ____ recipe?" The answer is "It Depends." Every type of yeast is slightly different. In general, yeast can be categorized into three different groups: champagne & beer yeast, distillers yeast, and bread yeast. Use the following guidelines for measuring the quantity of yeast that is added to a mash.

Before we get started, a reminder: Distilling alcohol is illegal without a federal fuel alcohol or distilled spirit plant permit as well as relevant state permits. Our distillation equipment is designed for legal uses only and the information in this article is for educational purposes only. Please read our complete legal summary for more information on the legalities of distillation.
 

Champagne or Beer Yeast

Whiskey mash with Bread Yeast When using a champagne or beer yeast it will have directions on the packet. Every champagnebeer yeast we have ever used is packaged to ferment 5 gallons of beer. When using champagne/beer yeast use 1 packet for every 5 gallons of mash.

Distillers Yeast

When using distillers yeast follow the directions on the packet.  If there are no directions we suggest 1 tablespoon of yeast per 5 gallons of mash.

Bread Yeast

When using bread yeast we have had great results with Fleischmann's bread yeast over the years. Bread yeast can be bought in packet form or in 1-2 pound bulk packages. It is normally cheaper to buy in bulk but it is more convenient to store the yeast in packets. We prefer packets and can justify the slight cost increase for the convenience/storage factor. Just follow the steps we have outlined below in order have great results using bread yeast.

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    Create a simple yeast starter for 5 gallons of mash

    1. Add 1/2 cup of 110 degree water to a sanitized jar.
    2. Add 2 teaspoons of sugar to the water and mix thoroughly.
    3. Add 2 packets of yeast (14 grams or 1 tablespoon if using bulk yeast).
    4. Swirl the glass to mix in the yeast with the sugar water.
    5. Let the glass sit for 20 minutes and it will double in size.
    6. Once the starter has doubled in size add it to the mash and aerate. 

     

    To learn more about yeast and fermentation check out our article on "Fermentation and Yeast".

    Remember, it is illegal to distill alcohol at home for consumption. Do not do this.

     

     

    Portrait of Emmet Leahy

    Emmet Leahy is the Chief Operating Officer and lead product developer at Clawhammer Supply, a small scale distillation and brewing equipment company. He loves the process of developing new equipment for making beer at home just as much as he does using it to brew his own beer. He's also passionate about teaching people how to use distillation equipment to produce distilled water, essential oils, and with the proper permits, fuel alcohol and distilled spirits.

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    59 Comments

    • J
      Comment Author: james

      Hi, Paul,
      your best bet is to check with your hydrometer as I have found that if your mash is only bubbling every 30 secs. or so then your mash is probably ready or as ready as its going to be. because of your low temp.You could try putting your mash somewhere warmer for a couple of days,see if you get any response, if not rack it

    • SB
      Comment Author: Samuel BOAS

      @Paul, Hi there i saw your question regarding the fermentation of your wodka mash. i would recommend to just let it sit till basically no more bubbles come. it is quite odd in my opinion that after 36 days still bubbles come but that is not bad or anything. do not add any extra yeast because for as far as i know that will not work well. best is just to wait. how much yeast did you add in the first place ?

      Kind regards,

      sam

    • P
      Comment Author: Paul

      Could someone please help I have made 23lt of Vodka sugar mash for the first time,1 full packet of Prestige Professional Vodka Yeast Blend with AG,and 8kg of sugar.The problem is its have not stopped bubbling and today is the 36th day,it bubbles every 30 seconds.the temp is 18c ,i am in Ireland so its not that warm this time of year.
      I would like to know if the mash is ruined,do I just have to wait,or can I add more yeast or anything to speed the process .
      Someone please reply.
      Thanks.

    • B
      Comment Author: BIll

      Very interesting and informative ,

    • F
      Comment Author: frank

      never done any of this before wish i could knew an old timer i could learn from but i dont know of any so im teaching myself just got a small 3 gallon still kit off eBay once i get the hang of it i want to get one of yours but how much mash do i use? do i fill it up or only go halfway? any info will be greatly appreciated thanks!