Seasoning is an important part of preventing menu fatigue; our tastebuds will expect some semblance of normalcy even in an emergency.
This site has both red and white wine powders at a better price than I've found elsewhere, along with individual servings of jam and salad dressing, perfect for a BOB or for guests staying over (some times that can feel like an emergency, but that's another story).
These things, plus mixes like brownies, biscuits and similar items are valuable to have on hand, but be sure to check the package to see what's needed to cook them. If you need milk, have you got dry on hand? Do you need egg? Better get those missing ingredients now before an emergency makes them unavailable.