Really depends on who your neighbors are. Baked goods are common, cookies/muffins/pies and whatever else. Sometimes it’s approaching with a plate of bbq/inviting you over to make a plate even if you don’t want to stay over for the bbq. I’ve had spring rolls and tamales offered in the past as well.

It’s an easy way to meet the new neighbors, most people appreciate food and homemade goods are a nice gesture because it shows you put some effort in and wanted to start the relationship off on the right foot.

Also if you live somewhere with an HOA usually the head of HOA will be the one welcoming you this way. Its their way of feeling out what type of neighbor you are and also trying give a face to the HOA that is friendly and kind before you inevitably get some sort of complaint about a rule you weren’t aware of yet in the neighborhood. I don’t mean that they have sinister intentions, it’s just they’d rather start things off pleasantly instead of the first time you hear from them being a complaint.

But yeah in general baked goods/homemade food is a normal and warm way to great a new neighbor/coworker/member of any group in America. It’s also very regular to offer to make food for a neighbor who is very ill or otherwise going through a difficult event in life.

You’ll see it the most in like classic middle class suburban neighborhoods. Thats not like a hard and fast rule though, just what I’ve seen in my life so far. Anyone anywhere is usually down for some free food though.