Onion powder adds background depth to almost every savoury dish. Here's exactly what to use instead.
Onion powder is made from dehydrated, finely ground onions. Like garlic powder, the dehydration process concentrates and mellows the flavour — fresh onion's sharp, pungent bite becomes a sweeter, more rounded flavour in powder form.
Onion powder is used as a flavour foundation in spice blends, dry rubs, soups, sauces, and marinades. It distributes evenly and contributes depth without adding moisture or texture. It is a primary component of many spice blends including onion soup mix, ranch seasoning, taco seasoning, and BBQ rubs.
Fresh onion provides the most flavour but also adds liquid, texture, and stronger pungency. For dry applications (rubs, dry mixes), powder is preferable. For cooked dishes, fresh onion is often superior.
Dried minced onion is the same product as onion powder but at a coarser grind. The pieces rehydrate when cooked. Use three times the volume of dried minced onion for onion powder.
Shallot powder has a similar flavour to onion powder but slightly sweeter and with a hint of garlic. Works as a direct substitute in most applications.
Celery salt provides a savoury, aromatic depth that partially fills the role of onion powder in spice blends and marinades. It adds celery flavour — appropriate in BBQ contexts and stuffing applications.
Identical guidance to garlic powder substitution. A tiny pinch of asafoetida bloomed in hot oil provides a cooked garlic-onion flavour without FODMAP compounds.