Peanut butter is thick, and if a baby eats too big of a serving, they could choke on it. Make sure to serve your little one thin, creamy peanut butter and avoid crunchy peanut butter. You can water down the peanut butter to thin it out even more.  Finally, it's important not to give whole nuts to babies, as they are much more likely to choke on them. It's recommended to wait until your child is at least 4 years old before offering whole nuts.