037. Blender
Pepper is the kind of person who constantly seeks new challenges. She finds her intellect means she bores easily, so she has taken on many roles.
Tony, by contrast, is very single-minded. He has dedicated his considerable genius in the pursuit of a significantly more narrow skill set.
That in mind, and considering his lifestyle, Pepper can't quite wrap her brain around the when's and how's of Tony's culinary skill. His offered explanation is Jarvis, which leads to more questions.
The answer, as with most mysteries surrounding Stark, is Iron Man.
Jarvis recruits Avengers to help with the housework.