Onion
Vegetables- AGE
- 6 months +
- COMMON ALLERGEN
- No
- CHOKING RISK
- Low · prep still matters
- IRON
- Not iron-rich
- GOOD FOR
- Fiber · Vitamin C
When can babies have onion?
From 6 months (corrected age), in the age-right form below.
- Rich in prebiotic fibers (fructans) that feed beneficial gut bacteria
- Adds a modest amount of vitamin C
How do I serve it at each age?
Safe form at 6–8 months
Onion cooked low and slow until translucent and completely floppy, chopped into bits no bigger than a pinky nail and melted into mashes, eggs, or sauces.
Pass/fail test: A piece should squash to nothing between two fingers and taste sweet rather than sharp when you sample it — any crunch or bite means more time in the pan.
Why this form: At this age onion is a flavor base, not a finger food: soft-cooked bits dissolved into other dishes teach real savory flavor with nothing for gums to battle.
How to prepare
- Dice an onion finely.
- Cook in olive oil over low heat for 10–15 minutes, until translucent and floppy — browning is optional.
- Chop any larger pieces down to pinky-nail bits.
- Fold into mashed vegetables, scrambled eggs, beans, or sauce.
Common mistakes
- Half-cooking it — sharp, sulfurous onion earns an instant refusal even though it isn't dangerous.
- Leaving big slippery petals that separate into slick layers.
- Treating onion as forbidden — it's a flavor food, not a hazard or an irritant at cooked doses.
How much?
A teaspoon or so of melted-soft bits inside other foods — a pinch of flavor is the whole point.
Amounts are starting points, not targets — watch the baby, not the numbers.
How do I get the texture right?
- Think of onion as an ingredient, not a solo food — its job is making vegetables, beans, and meats taste like family cooking.
- Low heat plus a lid turns onion sweet and soft in about ten minutes with no browning skill required.
- Caramelized onions are a free sweetness upgrade for lentils, beans, and pasta — no sugar involved.
- Cook onion into the shared pot, portion out the baby's serving, and salt the rest afterward.
Is onion a choking hazard?
Low risk in the forms above — shape and texture do the safety work. Any food can be a hazard served the wrong way, so match the form to your baby’s age.
Anything to watch for?
Onion's fermentable fibers can make some babies gassy at first — start small and build up gradually.