Bob's Red Mill Cornstarch is a dense powder obtained from the endosperm portion of corn. It is commonly used as a thickener for sauces, puddings, and such. It tends to form lumps so it is usually mixed with a small amount of liquid to make a paste before using it. Cornstarch is also used in Oriental breading mixtures.You might be surprised at how many skin care products contain cornstarch. Learn how to make 5 all natural DIY bath additive recipes on our blog, The Well!