As funny as it was that Sheldon J. Plankton was always looking for underhanded ways to find out Mr. Krabs' secret Krabby Patty formula, fans of the show have tried to figure out the mysterious burger recipe just as hard as he did.
There have always been theories, such as the secret ingredient being MSG, and the most popular one being that it's King Neptune's Poseidon Powder.
However, the most horrific theory going around makes so much sense.
Making its rounds on Reddit, fans of the show have pointed out that when looking at the rest of the menu, the items are named after what they are made out of, so by that logic, the Krabby Patty's secret formula involves crab meat.
The answer was in the name all along, and some are calling out Mr. Krabs for killing his own kind. We wouldn't put it past the sly businessman to cook a crab, and it is rather strange that there are no other crabs in the underwater city of Bikini Bottom.
One Reddit user even said that in the Netherlands, the Krabby Patty is just called the Crab Burger.
Then some have referenced a 2003 episode, where Mr. Krabs takes a bite out of a Krabby Patty and uttered the words, "Hmm, so that's what I taste like." Out of context, the clip makes you have a mind blowing moment, but the reason Mr. Krabs said it was because the burger was described by a customer as "old and dried out, like that man (Mr. Krabs) over there."
Is Mr. Krabs a cannibal? Maybe, but I like the theory that says there is no secret recipe and Mr. Krabs is using a placebo effect. Mr. Krabs' cheap ass would do something like that, and as a bonus, it drove Plankton nuts.