Half birthdays and smash cakes

Hi! Has anyone done or is anyone planning a half birthday for their baby? If so are you doing a smash cake and letting baby have any? Just a lick? Regular cake? Or making a smash cake out of baby food (rice cereal and sweet potatoes or something)? I know babies can’t drink milk but can they have things with milk in them? I also know that much sugar is bad for babies tummies. I know some people do it for pictures and the parents eat the cake or toss it out.

I’m thinking of making him a rice cereal pancake with sweet potatoes on top as frosting and letting him have at it LOL

Just curious what you guys were thinking or what your plans were and how you were going to facilitate them. TIA