We selected this processed material to prepare biscuits because it is commonly used in the elaboration of nougats , confectionery products, seasoning blends , bakery mixes, frostings,fillings, chocolate, creams and cereal bars. Results obtained indicated that the processing of peanut to obtain butter caused a decrease in the level of extracted proteins of about 50% and a loss of immunoreactive proteins of about 95% and 53% for Ara h1 and Ara h2, respectively.