Clabber Girl is a brand of baking powder, baking soda, and corn starch popular in the United States. It is manufactured by Hulman & Co., which also owns and operates the Indianapolis Motor Speedway and IndyCar, the sanctioning body for American open-wheel racing. The brand owns the Rumford baking powder label, as well. The Clabber Girl name brand comes from the word "clabber", which means clabbered milk (sour milk). In the early 1800s, people mixed clabber with pearl ash, soda, cream of tartar, and a few other ingredients to make what we know today as baking powder. The first baking powder brand by Hulman and company was the "Milk Brand". In 1899, it was changed to the "Clabber Brand". In 1923, the company changed the name to "Clabber Girl".
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