Once you realize that Oreo cookies have earned the number one spot as the top-selling cookie brand in the U.S., it's easy to see how they've earned an entire day devoted to them. National Oreo Day happens on March 6th every year but for some people, National Oreo Day is every day thanks to the sheer love that exists for these cream-filled cookies. And, as it turns out, the obsession with these cookies might not even be something that can be helped... as science has proven that they might actually have addictive properties. But on the other hand, who's actually complaining about that?

THETRAVEL VIDEO OF THE DAY

Related: These Mail-Order Cookies Are Allowing Us To Live Our Best Life Without Leaving The House

That's only one thing that many people don't know about these surprising little cookies. Among tons of flavors that vary around the world to the stuffing that fills the middle of each one, these cookies have a history that goes far beyond their sweet composition. Even the Oreo name comes with a mystery to solve which is fascinating in itself since the cookies were first created over a century ago. Ready for more? We're not sure you can handle it, but here goes nothing.

Each Oreo Requires A Cooking Time Of Almost One Hour

It seems almost absurd that the time spent making one Oreo cookie is the equivalent to that of a cheesecake or an apple pie but that's the way the cookie crumbles (or bakes). While the actual baking of the Oreo cookies doesn't take that long - roughly five minutes - it takes time to allow them to cool, make the filling, and spread the cookies.

The exact cooking time of an Oreo cookie is 290.6 seconds, with a cooking temperature that's different on the top and the bottom: 400 degrees Fahrenheit above, and 300 degrees Fahrenheit from below.

They Do Have Addictive Properties But Not In The Way You Think

The culprit behind the addictive properties of Oreo cookies lies in the nutrition facts, or lack thereof, in this instance. With such heft amounts of both sugars and fats, it's been suggested that the body's craving for both of these things is what keeps people coming back for more. It's a well-known fact that sugary snacks and sweets can become a bad habit to break but Oreo cookies are on a whole new level.

There Is No Definitive Explanation For The Name Of The Oreo

For a reason that's still unknown, Nabisco has never actually explained why the name of the cookies became 'Oreo.' Many people have theorized what it could potentially mean but nothing has ever been confirmed.

Related: Time To Get Lazy: These Are The Best Store-Bought Cookie Doughs Of 2020

Some fans reference other languages such as the French word for 'gold' or the Greek word for 'beautiful,' neither of which fully makes sense but could be a possibility. Others break down the actual word itself, painting a picture with the O's stacked at either end of the word being the wafer cookies, and the 'RE' in the middle making up the cream-filled center.

The Oreo Was Born In 1912 And Was Considered A 'High-Class Biscuit'

When Nabisco first created the Oreo cookie, it was meant to be a 'high-class biscuit,' making it one of the first of its kind to offer so much in such a small package.

The cookie wafer itself is more similar to that of a biscuit as one would see in the U.K., adding even more interest to an already fascinating cookie. The addition of the cream filling was an original creation all on its own, breaking away from the tradition of something such as a chocolate-covered wafer.

There Is A Debacle Between Double Stuf And Mega Stuf

There has been some criticism in the past over the fact that the Double Stuf Oreo does not technically have twice the amount of stuffing as a regular Oreo. In reality, the cream in the center has been measured to have only 1.86 times the amount of filling like that of a regular Oreo which, while not a big deal, is still a bit short of being doubled.

However, in stark contrast, the Mega Stuf Oreo has more than double the filling, with the cream measuring at a whopping 2.68 times that of a regular Oreo cookie.

The First Non-Original Oreo Flavor Was Of The Citrus Variety

There are more than 80 Oreo flavors around the world but the first flavor is one that might come as a surprise to many: lemon cream. It may have made more sense for the first flavor to be something chocolate-related or even peanut butter (that came later) but it was, indeed, lemon-inspired. This flavor was discontinued not long after its creation.

Next: 10 Awesome Oreo Flavors You Can Only Get In China