Plot: The pressure mounts in the chocolate-themed finale as host Scott Conant challenges the three remaining bakers to create grown-up versions of a brownie sundae. Then the Master Challenge is to make a Happy Birthday USA chocolate fireworks cake to celebrate July 4th! The elaborately decorated cake for 100 people must feature fireworks-themed chocolate and sugar decorations, three types of chocolate and two types of macarons with salty snacks as the featured ingredient