The story of the treacle tart is not as simple as it seems. Not only does treacle’s history go back to the beginnings of western civilization, but there are different types. It’s not as simple as “treacle.” There’s black treacle, medium brown treacle, and light treacle, also known as golden syrup.
The term “treacle” is used mainly to describe the black or brown forms of the syrup. However, it seems that the term is used loosely to describe several different kinds of sugar syrups, including golden. My mum insists that this isn’t so and, since she’s all British and stuff and would know first hand, I’m inclined to believe her. But what I really think is that there isn’t any sort of consensus on when which syrup is called what and why.
Like I'd pass up a chance to feature a picture of confused pugs...
Further, the name confusion makes it unclear about which treacle Mr. Weasley is pouring onto his porridge. Is it golden syrup or the black/brown treacle? It might be the traditional black treacle because the wizarding world, while advanced in so many ways, is also rooted firmly in older traditions. Golden syrup has only been around since the 1880’s and…well now I’m babbling.
"You are babbling, please stop."
The only real way to know is by asking J.K. Rowling herself. Could you imagine her opening a letter that said “Hey, JK, I was just wondering, what type of treacle is Mr. Weasley putting on his porridge? Yours truly, Esther.”
LOL you guys, I just got this letter from some girl named Esther about the type of treacle Mr. Weasley eats. This girl obviously has no life lololol.