Onion for Babies

Raw onion is too sharp and firm for babies, but cooked onion is a genuinely different food: soft, sweet, and mild, once heat breaks down the pungent compounds that make raw onion bite back and make eyes water. That transformation is why onion matters less for its own nutrition and more for teaching babies to accept savory, complex flavors early, rather than a diet of only sweet purees.

It still pulls some weight nutritionally, with vitamin C, B6, folate, and potassium, plus quercetin and prebiotic fiber that feeds healthy gut bacteria. The key is cooking it fully soft and translucent, then working it into familiar dishes like grains, eggs, or meat sauces rather than serving it on its own as a standalone food.

Onion isn't a common allergen, though it can cause gas or a fussy stomach in some babies, so start with small amounts mixed into familiar foods and see how they react. Most babies never notice it's there once it's cooked into a dish they already like.