i realized that the secret formula of the Krabby Patty is possibly… a Crab
Here are a few points to support this
1. The Krusty Krab is shaped like a crab and lobster trap
2. At the episode “Mid-Life Crustacean.”, Mr. Krabs takes a bite out of a Krabby Patty and says, “So that’s what I taste like”.
3. You don’t really see much Krabs aside from Mr. Krabs and his mom and if you tell me there’s tons of Krabs in the episode “Kracked Krabs”, may I remind you that they’re not from Bikini Bottom
4. Every menu item at Krusty Krab has the key ingredient in the name