How to Make Mash With Brewers Yeast (6 Steps)

Fermenting liquid used to create alcohol in beer, wine or whiskey is called a must or mash. Grain based mash and brewers yeast allows fermentation without adding sugar. The yeast feeds off the sugar naturally present in grain. A grain mill is usually required to crush grains for mash. One can be purchased or the grain store can mill it for you. Milled grain has a shelf life of about 2 weeks when stored in a cool, dry area. On the other hand, you can skip milling grain all together to make a mash with brewers yeast.

Things You'll Need

  • 10 lbs. corn kernels
  • Burlap bag
  • Water mister
  • 5 gallon cooking pot
  • Wood or plastic cutting board
  • Thick wood spoon or mallet
  • 5 gallons boiling water
  • 1 cup brewers yeast
  • Large funnel
  • 5, 1-gallon glass jugs
  • Balloon (optional)
  • 10 rubber bands (optional)
  • Cheese cloth

Instructions

  1. Soak 10 lbs. of corn in a burlap bag with warm water. Place it in a warm dark place. Mist the burlap daily to keep it moist for 10 days.

  2. Sprout the corn to ¼ inch long. Wash the corn kernels and remove all sprouts and roots.

  3. Crush the sprouted corn with a wooden spoon or mallet on the cutting board. Make sure you crack all kernels.

  4. Transfer the cracked kernels to 5 gallons of boiling water. Cool to water to room temperature. Stir in 1 cup of brewers yeast with the wood spoon. Brewer's yeast is used because it survives higher alcohol content than bakers yeast.

  5. Funnel 5 gallons of mash evenly into 1 gallon glass jugs. Loosely cover the jugs with cheese cloth. Attach with a rubber band at the jug's neck. Covering prevents unwanted mold and wild yeast spores from entering your mash. A balloon may be used instead of cheese cloth. The balloon will expand with carbon monoxide during fermentation. Replace the balloon every 2 to 3 days to release the gas.

  6. Ferment the mash for 7 to 10 days. You can tell that fermentation is complete when the bubbling stops and the liquid clears. Filter mash through cheese cloth to separate the liquid from solids.