Wall Street's oldest steakhouse has a secret menu for billionaires - here's what's on it

Delmonico's, located just a few blocks away from the New York Stock Exchange in downtown Manhattan, opened in 1837 as one of the first sit-down restaurants in America.

But while the restaurant is perhaps best known for its steaks, it also has a selection of food items you won't find on the menu. Called the "Secret Billionaire's Menu," these dishes will set you back quite a bit - there's a grilled cheese sandwich for $100, for example, and a golden twist on the classic black-and-white cookie for $50.

"We have a lot of Wall Street guys down here and they're always looking to outdo one another," Executive Chef Billy Oliva told Business Insider.

We recently got to try out the menu in person - here's what it was like.