AllerMates and pick up a wristband for it.
AllerMates site itself.
For just a few dollars, a warning wristband could potentially avoid accidental ingestion of food that might harm your child.
*I received a free product (or products) for review purposes. I did not receive any form of compensation from the company. All opinions are my own and not influenced in anyway. My reviews are not always positive, but they are my personal and honest opinions. Other people's views and experiences with the product or products might be different from mine.