If you want your spoon to last as long as possible, it helps to season an unfinished spoon. As with cast iron, seasoning the wood creates a protective coating that helps prevent it from warping or cracking.To season a wooden spoon, rub it down with food-grade mineral oil and allow the oil to soak in for approximately 15 minutes but preferably overnight. Wipe off any excess oil and place it in the oven at 350°F for a couple of minutes. After the initial seasoning, you’ll need to reseason the spoons about once a month.