Who came up with the idea for instant mashed potato?

The invention of instant mashed potato is credited to William A. Eldridge, a chemist working for the General Foods Corporation in the 1930s.

Eldridge, inspired by the popular "Dry-Milk" (instant milk powder) invention, developed a way to dehydrate potatoes using a spray-drying process. This resulted in a fine, powdery form of potato that could be reconstituted with water or milk to create mashed potatoes in minutes.

General Foods, under the brand name "Instant Potatoes", launched the product in 1939. It quickly gained popularity due to its convenience and affordability, becoming a staple in American households.