How to Introduce Peanut Butter to Babies Safely

Of all the first foods, peanut butter is the one that makes most mums pause. It feels risky in a way mashed banana never does. If you've been quietly putting it off, you're in good company — and the good news is that introducing it is far simpler, and far safer, than the worry suggests.

Here's exactly how to do it, one calm step at a time.

First, the advice has changed

For years, parents were told to delay peanuts and other allergens, especially if there was allergy in the family. That advice has now been reversed. Research showed that waiting may have actually been making things worse — and that introducing peanut early, once your baby has started solids, can help lower the risk of a peanut allergy developing.

So introducing peanut butter isn't just safe for most babies. Done at the right time, it's genuinely good for them.

When to introduce it

For most babies, around 6 months is the right time — once they're already sitting well, showing interest in food, and have comfortably tried a few simpler first foods like pumpkin, avocado or porridge.

There's one important exception. If your baby has severe eczema, an existing egg allergy, or a strong family history of allergies, they may be considered higher-risk. In that case, speak to your doctor or clinic before introducing peanut — they may suggest starting earlier, or under guidance. When in doubt, a quick chat with your health visitor settles it.

The golden rule: never off a spoon

This is the part that matters most. Never give your baby a spoonful of thick peanut butter, and never let them suck it off a spoon. A sticky lump of peanut butter is a real choking hazard — it clings to the roof of the mouth and is hard for a baby to manage.

Instead, make it loose and easy to swallow:

• Thin it down. Stir a small amount of smooth peanut butter with a little warm water, breast milk or formula until it's a loose, runny paste.
• Mix it in. Stir that thinned peanut butter into a food your baby already eats happily — millet porridge, oat porridge, or mashed banana work beautifully.
• Spread it thinly. If your baby is doing finger foods, spread a thin layer over a soft strip of toast. Thin, not thick.

Always use smooth peanut butter, never crunchy, and check the label for no added salt or sugar.

How to do it, step by step

• Pick a calm morning. Introduce peanut earlier in the day — at breakfast or lunch — not in the evening. That way you can watch your baby through the day rather than overnight.
• Do it at home. Not at the clinic, not at a relative's house, not on the way somewhere. Somewhere calm where you can pay attention.
• Start small. Offer just a small taste of the thinned peanut butter on the first try. If all is well, you can offer a little more next time.
• Watch and wait. Keep an eye on your baby for the next few hours.
• Give it a few days. Before introducing the next new allergen (like egg), wait two to three days. If you introduce them one at a time, you'll know exactly what caused a reaction if one ever happens.

Once peanut has gone in smoothly, the work isn't quite over — in a good way. To help your baby keep their tolerance, offer peanut-containing foods regularly, around twice a week, as part of their normal meals.

What a reaction looks like

Most reactions, when they happen at all, are mild. Knowing what to watch for takes the fear out of it.

Mild signs — usually appear quickly, within minutes to a couple of hours:

• A few hives or a red, blotchy rash, often around the mouth
• Mild swelling of the lips
• Some sniffling, sneezing or a runny nose
• A little vomiting or loose stool

If you notice mild signs in one area, stop offering the food, keep a close eye on your baby, and call your doctor for advice.

Signs that need urgent help — call for emergency help immediately if you see:

• Swelling of the face, tongue or lips that's getting worse
• Difficulty breathing, wheezing, or a persistent cough
• Going pale or floppy, or seeming very unwell

Severe reactions are rare, but knowing the difference means you can act calmly and quickly if you ever need to.

A simple first serving

If you'd like one easy way to start, this is hard to beat:

Stir half a teaspoon of smooth peanut butter into a little warm water until runny, then mix it through a few spoonfuls of your baby's usual morning porridge.

Familiar food, gentle introduction, nothing new about the texture — just the peanut. That's all it takes.

You've got this

Introducing peanut butter feels like a big moment, and it's natural to be nervous. But thinned, offered early, and introduced on its own with a watchful eye, it's one of the most worthwhile first foods you'll give. One calm morning, one small taste — and one more thing you can tick off with confidence.

This post is general information for healthy babies and isn't a substitute for medical advice. If your baby is higher-risk or you have any concerns, always check with your doctor or clinic first.