What was the first ready mix food to be sold commercially in 1889?

The first ready-mix food sold commercially in 1889 was "Pancake Flour," developed by the American company Aunt Jemima. This product was a pre-mixed blend of flour, baking powder, and other ingredients, designed for convenience in making pancakes. Its success marked the beginning of the ready-mix food industry, paving the way for a variety of similar products in subsequent years.