Anyone remember a Widen or Weidens Bakery?
You can have great fun with "does anyone remember" queries on the Forgotten Chicago website (go to Forums).
Also, try the Weber's Bakery website and go to Signature Items. They have a Banana Split cake with layers of fresh fruit. If you make a trip to Weber's, while you're at it, check out the coffee cake with a cheese filling and topped with about a quart of fresh strawberries.