Both typically fall under 850940, which covers food grinders, processors, mixers, and juice extractors with self-contained electric motors. The key is that the appliance must have a self-contained motor and perform a food-preparation function; the specific form factor (blender jar vs. processor bowl) does not change the heading. Consult the Explanatory Notes and, if needed, request a CBP binding ruling for novel designs.

A handheld immersion blender with a self-contained electric motor performing a food-processing function belongs in 8509, not in 8516 (which covers electrothermic appliances). The distinction turns on whether the appliance's principal function is mechanical food preparation (8509) or the application of heat (8516).