The first Shake Shack location began in 2001 as a hot dog cart in New York City's Madison Square Park that sold hamburgers, hot dogs, milkshakes, and crinkle-cut fries to visitors. Today, there are over 400 Shake Shack locations worldwide, and they offer many different items — though two of their shakes may sound similar.

Shake Shack offers a vanilla and chocolate shake, as well as a Black & White shake that takes inspiration from black and white cookies. While the vanilla and chocolate shake blends the two custards into one shake, the Black & White shake uses fudge sauce rather than chocolate custard.

Unfortunately, the addition of fudge sauce closely resembles the plain chocolate shake flavor, so the two shakes taste nearly identical when compared side-by-side. Despite the similarity, Insider reports that both the chocolate shake and the Black and White shake taste equally good.