Frosting on the Cake is a mission in GTA IV DLC The Ballad of Gay Tony. It is given by Gay Tony to Luis Lopez.

Mission

The mission starts showing Gracie, Evan and Rocco having a coke hit at Tony's apartment. Tony tells you to drive Stretch E with Evan to the docks in Broker to buy diamonds from The Cook. Once you get there you will see a cutscene showing Johnny sneaks to the meeting but fails. Another bodyguard drives you and Tony with a limo and you must cover yourself with Sticky Bombs from The Lost bikers then an APC will soon show up near the bridge. Throw as many Sticky Bombs as you can until the APC explodes. In the end of the bridge, your driver is shot and you must lose the heat. Go to Hercules to end the mission. The mission ends when Tony tells you that Evan is iced and the diamond is lost.

Trivia

This mission appears in The Lost and Damned with Johnny's point of view. This explains why the remaining Lost bikers are dead during the chase between Johnny and Evan.
If you fail the mission near the docks, you could get a Sawn-off Shotgun by killing a bodyguard or a biker.

Mission Requirements =

Time: 5:45

Player Damage: 50%

Bomb Accuracy

Escaped Cop Time: 0:35