Which foods are most likely to cause an allergic reaction in toddlers?

Your baby's pediatrician should have a list that they can give you. Honey (this includes Honey Nut Cheerios), nuts, and some other things that my brain is too tired to let me think of at this moment... : / Try Googling allergy foods for infants/toddlers. I google everything : ) Oh, and WebMD may be helpful as well.

There isnt a list per say but they say to try your child on one new food per week so that if there is an allergy or intolerance you know what is causing it. Eggs, and peanuts, and strawberries seem to be at the top of the most common.
http://www.foodallergy.org/allergens/index.html

There are studies being published by independent researchers that food allergies seem to be manufactored by, yes, us the moms. We are all so scared that our child might have an allergy that we withhold that food. Then, when we decide that child can eat food "A", then poof, a food allergy. If you child doesn't have an allergy, don't treat the child as if he/she does. Don't live scared, just live smart!

The main food allergies are eggs, milk/milk products, strawberries, nuts (including peanuts/peanut butter, wheat, soy, citrus fruits, whey and seafood. You never really know what your child is allergic to until you feed it to them. Just introduce one new food a week and watch for a reaction. We discovered my daughter was allergic to peaches at 8 mths by doing this. We also discovered that my son was allergic to citrus fruit, and ruhbarb when he was 2. You never know until you try. I do know they recommend you stay away from the common allergies until they are atleast 1. Sometimes even 2 or older. Especially if there is a history of food allergies on the paternal side of the family. Raw honey is a no go until 2 due to the risk of botulism. The Honey Nut Cheerios contains nuts, so avoidance of them is recommended. Talk to your childs Dr. about the food. They will always be your best resource for information.