Life ‘Shark Tank’ recap: Sisters’ macaron ice cream sandwiches prove a sweet investment April 21, 2019 Matthew Wilson, Special to USA TODAY Comments Off on ‘Shark Tank’ recap: Sisters’ macaron ice cream sandwiches prove a sweet investment Gwen and Christine Nguyen own Mavens Creamery, a California-based macaron ice cream sandwich maker. They were asking the sharks for $400,000.