Yellow Alder planks: Unlike alder chips and chunks which flavor the entrée with smoke, alder planks infuse your entrée with the sap of the wood. Therefore, you need to soak the plank in water or any other beverage that you desire, for at least two hours. It is like soaking a dehydrated vegetable. The sap actually flavors the entrée. Alder planks can be used in your oven broiler or on the grill for any kind of fish or seafood.