Portillo's is turning 55 this year, and they want everyone to come to their birthday party.

They aren't actually celebrating a birthday, more like an anniversary. Portillo's is celebrating its 55th anniversary on Wednesday, April 4 and customers are going to totally benefit.

That's because Portillo's is going to sell slices of their Famous Chocolate Cake for just 55-cents with a purchase of a hot dog, salad or ribs.

Good for dine-in and drive-thru customers only, sorry, online orders won't qualify for the 55-cent slice of cake.

The cake slice offer is good at every Portillo's location including Rockford but only while supplies last.

Sweet Lenny is the brand manager of 97ZOK and Operations Manager for Townsquare Media Rockford. Catch him afternoons 3 to 7 on 97ZOK. Follow him on TwitterInstagram and like his page on Facebook.