Chili’s: FREE Brownie SundaeFebruary 4, 2011 This post may contain a link to an affiliate. See my disclosure policy for more information. To celebrate their birthday, Chili’s is offering everyone a FREE Brownie Sundae! The coupon is valid starting tomorrow, 2/5 through 2/10.Entree purchase required. Not valid with other discounts. Limit one per table.