Photo by Peter Pham, Foodbeast

Ever since McDonald's started serving breakfast all day, it's been a pleasure grabbing a McGriddle in the middle of the night, or in the middle of the afternoon.

While eating a Quarter Pounder with a hash brown on the side was a nice combination of breakfast and lunch, there's one hack that no one's been using, to the point that it gives McDonald's employees that, "Aha!" moment upon you ordering it.

If you roll up to your local McDonald's and order a Big Mac, Quarter Pounder, McChicken or anything, you can add an egg to it.

Photo by Peter Pham, Foodbeast

That's right, if you want a "round egg" inside your Big Mac, just ask for it. If you've got a hankering for a "folded egg" in your cheeseburger, they have no problem throwing it on there, either.

I first tested it out at a Santa Ana, California McDonald's near work. I figured their eggs are obviously available during lunch time, so why not take a shot and see what happens.

Let's just call this the McEgg Mac/Photo by Isai Rocha

I ordered a Big Mac, and nervously said, "Would it be possible to throw a round egg in there?" The manager at the register gave me a look of intrigue, and simply responded with:

"Yeah, sure. Let me know how that tastes."

It worked, and it tasted glorious.

Photo by Peter Pham, Foodbeast

With this newfound knowledge at my disposal, I felt like a brand new door had opened for me at a restaurant where I felt everything had been done already.

I later went to a Whittier, California McDonald's to see if I'd get any pushback, but the cashier simply nodded her head, saying, "I don't see why not."

This time we tried it with a Quarter Pounder, along with a McChicken and a Cheeseburger, just to spruce up some of the value menu items.

Egg McChicken? Yes, Please./Photo by Peter Pham, Foodbeast

The eggs were a $1.80 add-on per sandwich, which isn't too crazy, and is a definite upgrade to your usual Dollar Menu sandwich, if you choose to go that route.

While the "round egg" is made fresh, I preferred the yellow folded egg, but both were delicious and worth it.

Now that we know what's up at McDonald's, the menu to us will be changed forever, as we should be putting eggs inside every damn sandwich from now on.