Hmmmm.... I'm trying remember exactly; I know it's written down in the records I keep of just about every meal this baby has eatten....! BUT, from memory, I think it must have been sometime around 10 months. It was after I knew he did fine with straight tofu cooked in broth and also with egg yolk and also with cheese.... I think that's right. Maybe sometime in month 9, but 10 for sure.