Cookware might seem like it’s pretty tough, but it’s actually not — it can get warped by heat, and nonstick coatings can scratch and chip, allowing potentially toxic chemicals to leach into your food.

While stainless steel, copper, and traditional nonstick are the most popular options for the best cookware sets, hard-anodized aluminum can offer some of the best value. According to Fran Groesbeck, ...