Portillo's Perks members get one free regular slice of Portillo's chocolate cake for their birthday. Perks members also receive a half-birthday slice and a sign-up anniversary slice.

Perks membership is free for US residents 16 and older, and registration collects your date of birth. The birthday reward is valid during your birthday month only. Members of the old Birthday Club were automatically transferred into Perks. Request this Freebie