Do not buy a serious cook a random kitchen gadget.
The more experienced the cook, the more personal their equipment becomes. Knives, pans, mixers, thermometers and tools are chosen for weight, balance, material and habit. Unless you know the exact model they want, the safer luxury is usually something consumable, highly specific, or beautifully useful at the table.
Upgrade a staple they already use
A cook does not need another bottle of generic olive oil. They may, however, enjoy an oil with enough character to finish beans, tomatoes or grilled bread. The same logic applies to salt, mustard, tea, honey and preserves: ordinary categories become interesting when the product has provenance and personality.
Choose tools that move from kitchen to table
Serving tools, cheese knives and small objects often have more gifting flexibility than technical cookware. They can be beautiful without asking the recipient to change how they cook.
For the experimental cook
Give an ingredient that opens a direction rather than a recipe: jasmine confit, truffle-infused oil, unusual honey, or a mustard with citrus and herbs. The best gift becomes a prompt for the cook’s own ideas.