1970s: Starting in England
In New England, "Frogurt" was invented and marketed as a healthier alternative to ice cream.
Other companies started making their own varieties, refining the taste.
1980s: The health trend
During the health food trend of the 1980s, it was marketed more as a healthier dessert.
TCBY and Yogen Früz opened.
1990s: Decline, for health reasons
Yet another health trend (the low-carb one) hurt frozen yogurt again.
Now: Premium froyo
Places like Pinkberry and 16 Handles now bring more "premium" options.
These places also offer self-serve frozen yogurt, bringing endless customization.