Question: how do you keep peanuts in the shell?
Answer: Spread the peanuts out in a single layer on a tray in warm, dry area. Dry the peanuts in the shell for two to three weeks or until the outer shell is dry and brittle. ... 
Place the peanuts in an airtight container or bag. ... 
Store the sealed container in a dark, cool place, such as a pantry.