INCI: Buttermilk Powder. Buttermilk Powder has a higher portion of acids than Whole Milk Powder, super boosting its exfoliative properties. It does have a slightly sour scent, which is masked by adding a fragrance to the formula. As this product is edible food grade, you can add a lovely twist to baking recipes too. Traditional Uses: You may have heard stories of beauty queens bathing in milk baths, the evening before their big pageant. Although it sounds far-fetched, it actually is done, for a few reasons. Milk baths soften the skin, and allow for easy exfoliation of dead skin cells, following the milk bath. Cosmetic Uses: Milk baths, bath tea, skin softening treatments.