Minnesota 13 was perceived as one product, but with hundreds of cookers, different recipes were used, and thus the taste and quality varied widely. This recipe, from "Minnesota 13: Stearns County's 'Wet' Wild Prohibition Days" by Elaine Davis, combines several fairly consistent narratives.
• Put ½ bushel of Minnesota 13 corn seed to sprout in barrel of warm water at 75-80 degrees for 2-3 days.
• Add 75 pounds of sugar, 1 pound yeast.
• Let the mix "mash" for 5-7 days depending on the weather. Mix will bubble and make "whumping" noise, and needs to be stirred regularly.
• Use gunny sack or dish towels to strain corn out of mash.
• Pour one-half of strained liquid into a 50-gallon copper still. Use the rest to set the next batch (see below).
• Cook the mixture over a fire or gas burner to evaporation point (not boiling) and reduce to 95 degrees; cook. Steam vapor will enter coil, condense into whiskey in cold catch barrel and drip out bottom into jugs (yields 80-120 proof).
• Sell as first-run white lightning if desired, otherwise refine with a second cooking.