The Complete Handbook of Outdoor Grilling Planks

Chapter 1: Understanding Outdoor Grilling Planks

What a Grilling Plank Actually Is

A grilling plank is a piece of wood, typically between 1 and 2 centimeters thick, used as a cooking surface directly on a grill. The plank sits between the heat source and the food, serving simultaneously as a solid surface, a heat diffuser, and a flavor delivery system. This is not a garnish or a gimmick. It is a cooking vessel with specific physical properties that affect how heat transfers, how moisture moves, and how flavor compounds are deposited onto the food.

The standard practice involves soaking the plank in water for a period before placing it on the grill. The soak is not for flavor. It is a fire-safety and temperature-control mechanism. The water saturates the wood fibers, raising the temperature required for the wood to ignite. Instead of burning, the plank undergoes a slower process of drying and then smoking. This distinction is the single most important concept to understand about this technique. A dry plank, or a plank that has been preheated incorrectly, is a fire hazard.

When the soaked plank is placed over a hot grill, the heat drives water out of the wood in the form of steam. This steam is forced up through the plank's grain, but it is contained by the food sitting on top. The result is a cooking environment that is a hybrid of steaming and grilling. The bottom of the food is cooked by conduction from the hot,