Death by bubble tea / Jennifer J. Chow

Enhanced descriptions from Syndetics:

Two cousins who start a food stall at their local night marketget a serving of murderin this first novel of a delicious new cozy mystery series by Jennifer J. Chow, bestselling author of Mimi Lee Gets a Clue .

When Yale Yee discovers her cousin Celine is visiting from Hong Kong, she is obliged to play tour guide to a relative she hasn't seen in twenty years. Not only that, but her father thinks it's a wonderful idea for them to bond by running a food stall together at the Eastwood Village Night Market. Yale hasn't cooked in years, and she hardly considers Celine's career as a social media influencer as adequate experience, but because she's just lost her job at her local bookstore, she feels she has no choice.

Yale and Celine serve small dishes and refreshing drinks, and while business is slow, it eventually picks up thanks to Celine's surprisingly useful marketing ideas. They're quite shocked that their bubble tea, in particular, is a hit-literally-when one of their customers turns up dead. Yale and Celine are prime suspects due to the gold flakes that Celine added to the sweet drink as a garnish. Though the two cousins are polar opposites in every way, they must work together to find out what really happened to the victim or the only thing they'll be serving is time.