For a baby’s first taste of peanut butter, start with just the tip of a teaspoon of thinned peanut butter puree. After watching for 15 to 20 minutes with no signs of a reaction, you can offer the rest of a small serving, about 2 teaspoons of smooth peanut butter thinned with water or breast milk. That 2-teaspoon serving contains roughly 2 grams of peanut protein, which is the amount used in the landmark clinical trials that shaped today’s guidelines.
How to Prepare It Safely
Straight peanut butter from the jar is a choking hazard for babies. You need to thin it out first. The NIAID recommends measuring 2 teaspoons of smooth peanut butter and slowly stirring in 2 to 3 teaspoons of hot water until it’s fully dissolved and blended. Let it cool before serving. If it still seems too thick, add more water or mix it into a previously tolerated infant cereal until it reaches a consistency your baby can handle easily.
You can also use breast milk or formula instead of water to thin it. Some parents prefer stirring peanut butter into oatmeal or a fruit puree their baby already likes. What matters is that there are no clumps or thick globs. The American Academy of Pediatrics warns against thick chunks of peanut butter for children under 4, so always spread thin or puree smooth.
Peanut puff snacks are another option. About 21 pieces of a peanut puff product like Bamba provides roughly the same 2 grams of peanut protein. For babies younger than 7 months, soften the puffs with 4 to 6 teaspoons of water first. Older babies who can handle dissolvable solids may eat them dry.
When to Start
Most babies can try peanut butter once they’ve started solid foods, typically around 6 months. Babies with severe eczema, an egg allergy, or both are actually the ones who benefit most from early introduction and should start as early as 4 to 6 months. This sounds counterintuitive, but the research is clear: early exposure in high-risk infants significantly reduces the chance of developing a peanut allergy.
For those high-risk babies, testing before introduction is recommended. Your pediatrician can order a skin prick test or a blood test to check for peanut-specific antibodies. The results help determine whether your baby should try peanut at home or under medical supervision. Babies with no eczema or egg allergy can generally start peanut at home without prior testing.
The First Feeding Step by Step
Give your baby just a tiny taste first, the tip of a teaspoon, and then wait 15 to 20 minutes. You’re watching for any signs of a reaction: hives, a rash, vomiting, diarrhea, a sudden change in behavior, or a hoarse-sounding cry. In infants, skin reactions and stomach symptoms are the most common signs of a food allergy. Heart-related symptoms like color changes are less typical in this age group.
If nothing happens after that initial observation window, offer the rest of the serving. Try to do the first introduction at home on a calm day, not right before a nap or car ride, so you can keep an eye on your baby for at least an hour or two afterward. Avoid introducing any other new foods on the same day, so you’ll know what caused a reaction if one occurs.
How Much to Keep Giving Each Week
The first serving is just the beginning. To build and maintain tolerance, your baby needs regular, ongoing exposure. The NIAID guidelines recommend approximately 6 to 7 grams of peanut protein per week, spread across 3 or more feedings. Since 2 teaspoons of peanut butter contains about 2 grams of peanut protein, that works out to roughly 2 teaspoons of peanut butter three times a week.
Consistency matters more than precision here. You don’t need to measure to the gram every time. The goal is to make peanut a regular part of your baby’s diet rather than a one-time introduction that gets forgotten. Mixing peanut butter into oatmeal at breakfast a few times a week, or offering peanut puffs as a snack, are easy ways to hit that target without overthinking it.
What Counts as a Reaction
Mild reactions in infants typically show up as itching, a few hives around the mouth, or a small rash. These can appear within minutes. Vomiting and diarrhea are also common in babies and toddlers with food allergies. A sudden behavioral change, like a baby who was happy becoming inconsolable, or a hoarse cry, can also signal a reaction.
If you notice mild hives around the mouth only, that could be a contact irritation rather than a true allergy, but it’s worth reporting to your pediatrician before offering peanut again. If your baby develops widespread hives, repeated vomiting, difficulty breathing, or becomes limp and unresponsive, that’s a severe reaction requiring emergency care.
Forms of Peanut to Avoid
Whole peanuts are a choking hazard and should not be given to children under 4. Chunky peanut butter falls into the same category. Stick with smooth peanut butter that’s been thinned or pureed, peanut flour mixed into other foods, or peanut puff snacks softened for younger babies. As your baby gets older and more skilled with chewing, you can spread a thin layer of smooth peanut butter on soft toast or mix peanut butter powder into smoothies and yogurt.