Chain: Wendy's
Introduced: 1969 

Every fast food milkshake wishes it was a Wendy's Frosty. As with most goodness from the chain, founder Dave Thomas deserves the credit. He realized that a 100% chocolate shake would be too intense when paired with a burger and fries, so he developed the Frosty, a subtle blend of chocolate and vanilla. It's not too heavy, and is especially excellent when smeared on fries.

The vanilla variation was placed on the menu full-time in 2006, but the original will forever hold a special place in our hearts.