Griddle warping

Why warping is the serious one

Almost everything that goes wrong with a griddle surface is recoverable. Rust abrades off. Flaking seasoning comes back to a sound layer. Carbon build-up resets.

Warping does not. A plate that has deformed stays deformed, and the consequence is permanent: grease pools in the low areas instead of running to the drain, oil migrates away from the high areas during cooking, and heat distribution changes because contact with the burners is no longer even.

It turns into the most common griddle complaint — grease that will not drain — except that this version cannot be fixed by leveling the cart.

The cause: thermal shock

Steel expands when heated. Warping happens when one part of the plate expands much faster than another, so the metal deforms rather than growing evenly.

Two ways that happens in practice:

• Cold water on a very hot plate. A modest squirt for steam-lifting is fine and is standard technique. Dumping a jug of cold water, or hosing down a screaming-hot griddle, is not.
• Every burner on maximum under a cold plate. The areas directly over the burners shoot up in temperature while the areas between them lag badly.

Prevention

1. Bring the plate up gradually. Medium for a few minutes, then up. This costs you nothing — the griddle reaches temperature at roughly the same time either way, because the limiting factor is total energy rather than knob position.
2. Use water sparingly and from a squeeze bottle, not a jug.
3. Let it cool before heavy water contact or before moving it in cold rain.
4. Do not run empty on maximum for long periods. There is nothing absorbing the heat.

Thickness resists it

A thicker plate has more thermal mass and conducts heat more evenly across itself, so temperature differentials are smaller and the steel is stiffer against deformation.

This is a practical argument for the thicker cooktops: the Blackstone 28’s 10-gauge plate, the Pit Boss Deluxe’s 4.7 mm, and most of all the 3/16 to 3/8 inch steel inserts, which are the stiffest surfaces in our guide.

If it has already warped

Be realistic: you are not going to flatten it. Options, in order of sense:

• Level or angle the cart to compensate. If the warp has created a low area away from the drain, deliberately tilting the whole griddle can restore drainage. This is exactly what the LoCo’s cooktop leveling system is for, and shims under cart legs achieve a cruder version on any griddle.
• Cook around it. Treat the low area as where oil and grease will collect, and use it accordingly — it is actually a reasonable place to cook onions.
• Replace the cooktop. On brands with good parts availability — Blackstone especially — a replacement griddle top is a part you can buy. This is a real argument for the ecosystem.

Buying used

Check for warping before anything else, because it is the one fault you cannot fix. Put a straight edge across the plate in both directions, or pour a little water on and watch where it goes.

Rust on a used griddle is cosmetic by comparison and entirely recoverable. More on buying used.