| Clue | Source | Date |
|---|---|---|
| It's topped with yellow mustard, onions, tomatoes, sport peppers, relish, celery salt and a pickle | Wall Street Journal | 29 Jan 2025 |
| Second City food with no ketchup | Universal | 09 Sep 2024 |
| Windy City food served without ketchup | Universal | 01 Jul 2023 |
| Wrigley Field treat in a poppy seed bun | USA Today | 16 Oct 2022 |