What condiment is default for the old timer and old timer with cheese?

The default condiment for the Old Timer and Old Timer with Cheese is mustard. This choice reflects the classic approach to enhancing the flavor profile of a burger, particularly one that is designed to evoke a traditional, all-American taste experience. Mustard is often paired with beef to provide a slight tang that complements the savory elements of the meat and cheese, contributing to a well-rounded flavor.

While mayonnaise, ketchup, and barbecue sauce are common condiments that may be offered with various burgers, mustard is the quintessential pairing for these specific items on the Chili's menu, aligning with typical regional preferences and customer expectations for grilled burgers.