What Is Induction Cookware? | Magnetic Pan Basics

If you own or are shopping for an induction cooktop, you need pans that actually work with it. The difference is simple: induction cookware must be magnetic. A copper-bottomed heirloom pan you love will sit cold on an induction burner, while a basic cast-iron skillet heats up faster than you’d expect. Here is what defines induction cookware, how to check yours, and what to look for when buying.

What Makes Cookware Induction-Compatible?

The cooktop surface itself does not get hot like a traditional burner. Instead, Bosch explains that a magnetic field under the glass heats the pan directly by inducing currents in its base. That means the cookware must contain enough iron or magnetic steel to interact with the field. Common materials that work naturally include:

• Cast iron — naturally magnetic and excellent at holding heat.
• Carbon steel — magnetic, lighter than cast iron, and heats quickly.
• Magnetic stainless steel — some stainless steel grades (often 400-series) are magnetic, and many induction-ready pans add a magnetic layer in the base.
• Enameled cast iron — works the same as plain cast iron underneath the coating.

Nonmagnetic stainless steel (typically 300-series) and plain aluminum will not heat on an induction burner unless the manufacturer bonds a magnetic plate into the base. If you are not sure, a two-second magnet test tells you everything.

How To Check If Your Pans Work On Induction

Consumer Reports recommends the standard test: hold a refrigerator magnet against the bottom of the pan. If the magnet sticks firmly, the pan will work. If it slides off or barely holds, the pan is unlikely to heat properly. Focus on the flat cooking surface — the rim and sides may be nonmagnetic even when the base works. For new purchases, look for the induction symbol (a zigzag coil icon) on the packaging or the pan’s bottom, and confirm the manufacturer lists induction compatibility in the specs.

A few important caveats: thin steel pans may pass the magnet test but cook unevenly because they lack the mass to spread heat well. Quality matters alongside compatibility. Also, induction cooktops can still get hot from residual heat transferred from the pan — the surface stays cooler during cooking than a gas flame or electric coil, but you should never assume it is safe to touch.

If you are ready to buy, our roundup of tested options for induction cookware breaks down what performs best on different cooktop brands.

Common Induction Cookware Mistakes

The most frequent error is assuming any metal pan works. Aluminum and copper cookware without a magnetic base will not heat at all. Another mistake is testing the pan’s rim instead of its base — thin stainless rims might attract a magnet weakly even when the cooking surface cannot sustain induction heating. Finally, buying cheap induction-compatible pans with very thin bases can lead to hot spots and scorching. The base construction and thickness matter almost as much as the magnetic property.

Induction Cookware vs. Induction Cooktop

These two terms often get confused. The induction cooktop is the appliance — the glass surface with the electromagnetic coil underneath. Induction cookware is the vessel itself — the pan that gets heated. You need both parts for the system to work. A good induction pan on a poor cooktop or a poor pan on a great cooktop both produce disappointing results. Always check the appliance manual and the cookware manufacturer’s recommendations together before buying.