Tillie Doyle
Baking sheets and pans are made from multiple layers of metal, which expand when exposed to heat. However, the metal does not expand at the same rate, with the bottom of the pan expanding faster and slightly more than the edges. This creates internal stress, causing the pan to bend or twist. Pans are more likely to warp when exposed to rapid changes in temperature, such as rinsing a hot pan in cold water. Thin, single-ply pans made with soft metals like aluminium and copper are more prone to warping than thick, multi-ply pans made with hard metals like steel. To fix a warped pan, one can simply bend it back into shape by applying pressure on the corners and in the middle. Another method is to place a towel on a hard surface, lay the pan on top, and hit the surface with a hammer until the pan bends back into shape.
How to bend back non-stick baking pans
| Characteristics | Values |
|---|---|
| Why pans warp | Pans warp due to rapid changes in temperature, especially when thin, single-ply pans made with soft metals like aluminum and copper are used. |
| How to prevent warping | Avoid placing cold pans in a hot oven, use the right-sized sheet pan, and be aware of the oven's hot and cool spots. |
| How to fix a warped pan | Place the pan on a flat surface, use a towel and a wooden block, and hit the block with a hammer until the pan bends back into shape. |
| Recommended materials for warp-resistant pans | Thick, multi-ply pans made with hard metals like steel and hard-anodized aluminum. |
| Recommended brands for warp-resistant pans | Calphalon and All-Clad offer some of the most warp-resistant cookware. |
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What You'll Learn
Place the pan on a flat surface and apply pressure
Warping occurs when a pan is exposed to rapid changes in temperature, causing the metal to expand and contract unevenly. This can happen when rinsing a hot pan in cold water, overheating, or using a pan that doesn't fit the burner size. Thin single-ply pans made with soft metals like aluminium and copper are more prone to warping than thicker, multi-ply pans made with harder metals like steel and hard-anodized aluminium.
If your nonstick baking pan has warped, you can attempt to bend it back into shape. First, lay the pan on a flat surface and assess how it has warped. Place a towel underneath to prevent damage to the surface or pan. Then, hold the pan under your arm and use your hands to apply pressure to the corners and middle until it bends back into shape. Check to ensure it is flat, and repeat the process until it no longer wobbles. While it's difficult to get it perfectly flat, you should be able to get it close.
Alternatively, you can try placing a wooden block on top of the warped area and gently hitting it with a hammer or mallet until the pan bends back into shape. This method distributes the force evenly, reducing the risk of damaging the pan or leaving dimples. Remember to avoid hitting the pan directly with a hammer, as this can cause further damage.
To prevent warping in the future, avoid exposing your nonstick baking pans to rapid temperature changes. Allow the pan to cool naturally at room temperature before washing it. Additionally, consider investing in thicker, multi-ply pans made with harder metals, which are less prone to warping.
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Use a hammer and wooden block
To bend back a warped non-stick baking pan, you can use a hammer and a wooden block. Place the pan on a flat surface, preferably a hard surface that won't be damaged by the hammering, such as concrete. Cover the surface with a towel to protect the pan. Place the wooden block on top of the pan. Using a hammer, hit the wooden block until the pan bends back into shape. Make sure to hit different parts of the block to smooth out the pan's surface.
This method is effective because the wooden block spreads the force of the hammer across the pan, flattening the entire surface without causing further damage. Hitting the pan directly with a hammer can create dimples and cause more harm than good.
When attempting to reshape a warped pan, it's important to remember that it may never return to its original form. The metal weakens when its molecular structure is compromised, and once warped, it will always be more susceptible to warping again.
Additionally, warping often occurs due to rapid temperature changes. Thin, single-ply pans made with soft metals like aluminium and copper are more prone to warping than thicker, multi-ply pans made with harder metals like steel and hard-anodized aluminium.
If your non-stick baking pan has warped, using a hammer and wooden block to gently tap it back into shape can be a viable solution. Just remember to take the necessary precautions and work on a suitable surface to avoid any further damage to your pan or surroundings.
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Avoid rapid temperature changes
Warping occurs when cookware is exposed to rapid changes in temperature. When a pan is heated or cooled quickly, different parts expand or contract at different rates, causing it to bend or twist. This is known as thermal shock. To prevent this from happening to your nonstick baking pans, follow these guidelines:
Firstly, avoid rinsing hot pans in cold water. This is the leading cause of warping. Allow your pans to cool naturally, reaching room temperature before washing them. If the pan is extremely hot, place it back in the (switched-off) oven to let it cool down gradually.
Secondly, be mindful of the temperature of your pans and your oven. Avoid placing cold pans in a hot oven. If you need to chill cookie dough, use a plate instead of the baking pan. You can also place an empty sheet pan in the oven as it preheats. For cookies, preheat the pan for a short time or run hot water over it first, as an overly hot pan could cause the cookies to spread too fast.
Thirdly, use the right-sized pan for your food. Bare spots on the pan will heat up faster than covered spots, and this temperature difference can cause warping. Fill bigger gaps with food, but also be sure not to crowd your pan, as some space is needed for the heat to circulate and cook your food evenly.
Finally, be aware of your oven's hot and cool spots. Place your pan in the centre of the middle rack, rotating it during cooking if needed.
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Use a thicker, multi-ply pan
Thicker, multi-ply pans are less likely to warp than thin, single-ply pans. Pans with thin walls are more susceptible to warping because they cannot absorb expansion and contraction as effectively as thicker pans. Therefore, investing in a thicker, multi-ply pan is a good idea if you want to avoid warping.
Multi-ply pans are constructed with multiple layers of metals bonded together, whereas single-ply pans are made with only one material. Multi-ply pans have a core layer of conductive material, such as aluminium or copper, which spreads heat evenly throughout the cookware. They also have an ultra-hard stainless steel exterior that retains heat for long periods. This combination of even heat conduction and heat retention makes multi-ply pans extremely resistant to warping.
Thicker pans are also more durable and bake more evenly than thinner pans. However, it is important to note that going too thick can add weight and slow down the browning process. Therefore, the ideal thickness for a baking pan is around 2.5 mm or 18 gauge.
If you already own a thicker, multi-ply pan that has warped, you can try to bend it back into shape. First, find a hard surface where you can lay the body of the pan flat without the handle getting in the way. Place a towel down to pad the surface and prevent any damage to the pan. Then, use a hammer or mallet to hit a wooden block placed on top of the pan until it bends back into shape. Do not hit the towel or the pan directly with the hammer, as this can cause damage and leave dimples in the pan.
By following these steps and choosing thicker, multi-ply pans, you can effectively reduce the likelihood of warping and extend the lifespan of your cookware.
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Let the pan cool naturally
Warping occurs when cookware is exposed to rapid changes in temperature. This can happen when a hot pan is rinsed in cold water, or from overheating, or a mismatch between the pan and the burner's size. The best way to repair a warped pan is to bend it back into shape. However, to prevent warping, it is important to let the pan cool naturally.
Letting a pan cool naturally is also important for baked goods. For example, brownies need to cool in the pan for the best texture and to set up. Cakes should also be left to cool naturally at room temperature for at least ten minutes before being removed from the pan, as this helps to prevent crumbling or expansion within the pan. Cheesecakes should also be allowed to cool naturally for longer than most other cakes, as sudden temperature changes can lead to poor results. Breads, quick breads, dense cakes, and cookies can be left to cool naturally on the counter overnight.
It is important to note that removing baked goods from the pan too early can cause them to crumble or fall apart. Therefore, it is recommended to let them cool completely before attempting to remove them from the pan. This will allow the bottom and sides of the baked good to stop drawing warmth from the pan and will help it to cool faster once removed.
Additionally, it is worth mentioning that some pans, such as Vollrath, have a concave bottom that flattens out when heated. These pans may not require bending back into shape as they will return to their original shape as they cool.
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