Do I need to introduce foods one at a time?

Yes it would be advisable to introduce new food one at a time. This is to track if baby happens to have any allergic reactions. Also babies have sensitive taste buds we try not to overwhelm them with the variety of food. Introducing it one by one allows both baby and parents to have a food log too. http://www.whattoexpect.com/first-year/start-solids/ Hope this helps.