Onion flakes, usually sold in the dried herb and spice section of the grocery store, are simply dehydrated, chopped onions. 

They are available in forms like white onion granules, minced, chopped, fried.

Onion flakes, usually sold in the dried herb and spice section of the grocery store, are simply dehydrated, chopped onions. 

They are available in forms like white onion granules, minced, chopped, fried.