how long do you roast raw peanuts
1 Place raw peanuts, in shell or shelled, one layer deep in a shallow baking pan. Sprinkle salt over. 2  Roast in a 350 degree F oven; 15 to 20 minutes for shelled and 20 to 25 minutes for in shell peanuts.  Remove from heat just short of doneness desired, as peanuts continue to cook as they cool.