When can a baby have peanut butter?
Last updated August 19, 2026
Peanut butter can be introduced from around six months, alongside a baby's other first foods, according to NHS guidance — and starting early is the point, not a detail to get to later. It has to be thinned first: a spoonful of peanut butter on its own is claggy enough to be a choking risk.
When can a baby have peanut butter?
From around six months, at the same time as other first foods — not held back until later. NHS Best Start in Life guidance says allergens including peanuts "can be introduced from around 6 months as part of your baby's diet, just like any others," and to "introduce the foods that can trigger allergic reactions 1 at a time and in very small amounts so that you can spot any reaction."
If your baby already has a diagnosed food allergy, or eczema, the NHS says "you may need to be particularly careful when introducing foods" and to talk to your GP or health visitor first, since that group can benefit from earlier, supervised introduction rather than a delay.
Why introduce peanut butter early?
Because delaying it is the higher-risk option. The NHS is direct about this: "delaying introducing peanuts and hens' eggs after 6 to 12 months may increase the risk of developing an allergy to them." That is a reversal of older advice that told parents to hold off on peanuts, and it is why peanut butter now appears on most "first foods" lists rather than a "wait and see" list.
Once your baby tolerates it, the guidance is to keep going: "keep offering those foods as part of your baby's usual diet to minimise the risk of allergy." A single successful taste is not the finish line — regular small amounts are what the advice is actually about.
How do you serve peanut butter safely?
Thin it, always. Peanut butter on a spoon is thick enough to stick to the roof of a baby's mouth, which is a choking mechanism, not an allergy one — the two risks need different handling and this one is about texture. Spread it thinly on toast, stir a small amount through warm porridge or yoghurt, or thin it with a little breast milk, formula or water so it drops off a spoon rather than clinging to it.
Crunchy peanut butter carries whole nut pieces and is not the same food as smooth, thinned peanut butter for this purpose — treat it like the whole nuts below rather than a shortcut.
Is peanut butter a choking hazard on its own?
Only in the wrong shape — smooth, thinned nut butter is a normal first food; whole or chopped nuts are not, for years afterwards. Whole nuts, including peanuts, stay off the menu until around five years old regardless of how the allergy question resolves, because the hazard there is size and hardness, not protein. Ground or flaked nuts stirred into food are a different, earlier-safe shape.
If you are introducing peanut butter as part of baby-led weaning, thinness is the whole technique — there is no BLW-shaped exception to the claggy-texture problem.
What are the signs of a peanut allergy reaction?
Watch for anything on the skin, breathing, or digestion in the hour after a first taste — hives or a rash, swelling around the mouth or eyes, vomiting, or any change in breathing. Introducing one new allergen at a time, in a small amount, is what makes a reaction possible to spot at all; the NHS guidance above is built around that, not around avoidance.
Mild reactions such as a rash around the mouth can happen and do not automatically mean a lasting allergy — but any breathing difficulty, facial or mouth swelling, or repeated vomiting needs urgent medical attention. If you are unsure whether what you saw was a reaction, your GP or health visitor is the right first call, not a forum thread.
The short version
Peanut butter can start from around six months, offered early rather than delayed, spread thin or stirred through food so it is not claggy, and kept in the regular rotation once it is tolerated. Whole nuts are a separate, later-safe food. If you are watching for a first reaction, do it with one new allergen at a time and know when to call for help.