The development of Brownie with Fiber from Pineapple core. A was an experimental research with the following purposes : (1) to study the basic formula for brownie ; (2) to compare the quantity of pineapple in the brownie with fiber from pineapple core ; (3) to compare the nutritive values between the basic formula of brownie and brownie with fiber ; (4) study on consumer acceptance of products brownie with fiber from pineapple core.