Neil Patrick Harris / David Burtka

Power couple Neil Patrick Harris and David Burtka join Dan in the kitchen to discuss their careers and family life, but there is one major obstacle: their shared visceral loathing of mayonnaise. Dan attempts to break down the science of emulsification to show them that mayo is more than just a "gloopy" condiment. He serves three elevated dishes where mayo is the secret structural star, hoping to flip the script for this duo.