Giving solid to a 1 month baby??

Briana

Okay i have a question. We were over at my family's yesterday. It was my little cousins bday. We have our little 1 month baby with us. While they were cutting the cake my aunt gets a small piece of frosting and gives it to my baby. We read online this is a old tradition older people do😳😳🤦🏻‍♀️🤦🏻‍♀️She is completely fine. But what do i tell my aunt next time? And is this bad?