Shake Shack is testing combo meals for the first time at some of its drive-thrus, as well as 8-ounce mini-shakes and sundaes at select restaurant locations, CEO Randy Garutti said during a conference call announcing the chain’s fourth quarter and annual earnings.

Garutti said the limited-service industry has already established that customers like combo meals, such as sandwiches, fries, and a drink, at drive-thrus, and he wanted to try them at his chain while still maintaining the brand’s identity of offering a relatively upscale experience.

Desserts, such as the sundaes that Shake Shack offered before the pandemic and the mini-shakes that it started testing at the beginning of last year, are being tested at select locations to see if they can boost sales and increase afternoon traffic.