McDonald's is adding new breakfast sandwiches with 3 times as much meat to its menu. Here's how they actually taste. (MCD)

• McDonald's debuted Triple Breakfast Stacks— breakfast sandwiches with three times as much meat — on Thursday.
• The Triple Breakfast Stacks are McMuffins, McGriddles, or biscuits that contain two sausage patties each, plus bacon slices.
• We taste tested the Triple Breakfast Stacks and discovered a disgustingly delicious new set of breakfast sandwiches.

The meatiest McDonald's breakfast sandwiches ever have arrived.

On Thursday, the fast-food giant debuted Triple Breakfast Stacks — essentially revamped versions of the biscuit, the McMuffin, and the McGriddle, with three times as much meat as the typical breakfast sandwich. Each contains eggs, two sausage patties, and bacon slices.

Business Insider first reported on the company's plans to introduce the sandwiches after viewing internal documents from McDonald's. So, we knew how to create these meat-filled masterpieces.

Read more:Leaked documents reveal McDonald's is expanding its breakfast menu for the first time in years with sandwiches that contain 3 times the meat

With this knowledge, we crafted our own Triple Breakfast Stacks for a taste test ahead of Thursday's launch.

Here's what the super-meaty breakfast sandwiches are actually like:

SEE ALSO: McDonald's adds new perks for employees as fast-food chains battle for workers

First things first: The stacks are tall.

It's easy to feel like a cartoon character unhinging your jaw as you try to stuff the Biscuit Stack, the largest of the lot, into your mouth.

Despite the decadence, the flavor profile of all three sandwiches was generally embraced by taste testers.