what is a butter tart?

Based on an actual exchange between my husband and I one quiet evening. Whilst I was scrolling through facebook, I found an article about Canadian treats that are iconic to the country. As I was going through the list, I stumbled upon buttertarts. I nonchalantly ask “hey… what’s a buttertart?” …The best way to describe my husband’s reaction was simply that his Canadian intensified XD

To answer the question, yes, I now know what a butter tart is <3