What's in the new 'top-secret' Krabby Patty sauce? Wendy's keeping recipe 'closely guarded'

it plans to launch a new cheeseburger called the " ," and in true "SpongeBob" fashion, it'll come with a "top-secret" sauce. Also launching as part of the collaboration with Paramount is a vanilla Frosty with a pineapple mango flavored puree swirl, called a Pineapple Under the Sea Frosty. But the big ticket item is the fast food chain's take on the famous Krabby Patty, called the Krabby Patty Kollab Burger.

The burger features a quarter pound of beef, two slices of melty American cheese, lettuce, tomato, pickle, onion, and a "top-secret Krabby Kollab sauce," on a toasted bun. But what's so special about the Krabby Patty and its secret sauce? Wendy's has been tight-lipped on details, but here's what we know so far. Both menu items − the cheeseburger and the Frosty − will be available nationwide in the U.

S., Canada and Guam beginning Tuesday, Oct. 8, Wendy's said in a news release.

Customers in Los Angeles can get an exclusive first taste of the Krabby Patty Kollab Meal on Monday, Oct. 7 and Tuesday, Oct. 8 through an "immersive Wendy's drive-thru experience" in Panorama City, Wendy's said.

The announcement of the burger's ingredients led many fans to wonder, "What's in the secret sauce?" We asked, and Wendy's answered with the following: "Our top-secret Krabby Kollab sauce is a closely guarded recipe that makes the first bite of the Krabby Patty Kollab Burger worth the wait for 'SpongeBob SquarePants' fans and Wendy's customers alike," a Wendy's spokesperson told USA TODAY.