Bella Online, "The Voice of Women," has a hiking and backpacking
editor named Jill Florio, who recommends
tossing a few emergency rations in her pack.

My day hiking X-Rations are usually extra Luna Bars, a few packets of instant
oatmeal (you can add cold water right into the package if you tear off the
top…it’s not hot food, but it WILL give you energy), a few packets of sugar
and a bunch of salt packets. On long day hikes or backpack trips I will also
carry a few packets of Top Ramen noodles and some dehydrated mashed potatoes.
My emergency kit gets its own little drawstring ditty bag that I keep apart
from the regular travel food stuff stack.

Jill has a bunch more swell tips in
her archive of previous posts.