Taste Tracker: Olive Garden, Sonic, Donato’s, Chick-fil-A, Jack in the Box, Whataburger, Twin Peaks, Taco Bell, Cowboy Chicken and more headline restaurant menu trends and news.

The Chinese tea chain, which opened its first store in Los Angeles a year ago, now has nine locations here, giving it a foothold for expansion.

The Bottom Line: This week’s edition of the weekly restaurant finance newsletter looks at economic data, and why a booming market is of little help.