Ever wonder about your ancestor's life in the 1920s? The website, The Roaring Twenties: A Historical Snapshot of Life in the 1920s and their blog, provides some great information about all sorts of social history including food.
The short article on food includes information on what foods were ate, appliances and prohibition. A list of food advertisements provides an idea of what was available from various companies.
Other pages that relate to food include Prohibition and Garden.