Meet our Team


Debbie Wei Mullin
CEO, Founder

Debbie grew up with a mixture of Vietnamese, Chinese, and Jewish-American home-cooking.  Though originally from the bay area, she has lived and worked all across Asia, from Beijing to New Delhi, before relocating to Los Angeles, CA. Copper Cow Coffee reflects the depth of Debbie's travels as well as her stubbornness for recreating, transporting, and elevating the flavors she grew up loving, with a California twist. 


Irene Hsu
Head of Business Development & Operations

With a strong analytical background anchored in finance and marketing at MIT, Irene has rich experience in business strategy and planning at Goldman Sachs and Apple. Pursuing a passion for food & beverage, she attended culinary school at Le Cordon Bleu in Paris, and then immersed herself in the San Francisco food scene working in strategy and operations roles at Munchery and Philz Coffee before joining the Wei Pantry team.  

Lillian Mayer
Event Management & Sales

Lillian's passion for working at the intersection of food, sustainability and community first started when she successfully established a food and housing cooperative in at her college in New York. Her work now at Copper Cow Coffee pulls on her strengths to bring people together now over delicious, sustainably-sourced Vietnamese coffee. When Lillian isn't at the office, you can usually find her planning an LA adventure or cooking up a storm for her friends.