So what kind of chocolate is best for melt-resistance? I've also heard that when the chocolate gets that whitish crust after a long while, it's still edible. Anyone know if that's true?

I have eaten some that was white and it didn't cause me any harm but there is absolutely no polite way to describe the vile nasty disgusting taste. I was however able to keep a staight face and talk up how good it was till my best friend had a bite too. I don't know how old it was at least 10 years (in my mre's)

Where are you finding D-rats? I've been hunting for years without luck. I've tried a bunch of recipies, but not had squat for improvements in heat stability and some were worse than a basic chocolate chip.

Heck, where are you finding K-rations?

Or are you just using common components and equating them to their nearest similar military item?

Emergency Essentials has single-serving MRE's available. You aren't forced to buy a case at a time, and there are quite a few to choose from. Average price is about $2.50 each. I have about a dozen in my car kit.

IIRC the white is the cocoa butter leaching out.

I hope that you are just using the terms C, D, and K rations as a generic term for more current foods. To the best of my knowledge, D and K rats were a WWII item, and have not been produced (under that term anyway) since then, and C rat production was halted in the 1980's. I have a case or so of C rats around, but I don't believe I would want to eat any of them today. Original D and K's might even be collectors items...

Yes, I'm using them as a reference only but I am applying those terms for the types of food that is commercially available. Yes, I am trying to stay generic and not become a source of free advertising for some corporation.

See my reply to Old Bald Guy.

Basic D rats: chocolate, hard candy, high energy/sugar types.

Basic K rats: US mil aviation dining packets, includes: plastic knife, fork, spoon, sugar, salt, pepper, drinking straw, napkin (can be used for TP), church key, etc. Many commercial varieties are available as you will receive them from caterers @ different events with some more or less of these items. Throw in 4 cigarettes, matches, and 2 pieces of Chicklets and what do you have? That's why I save the packaged sporks, packaged dining kits from take-out dinners, packs of ketchup, taco sauce, salt & pepper packs, etc as I come across extras.

It's because I am a cheap date with a tight fisted technique with money.

Bummer. You had me really excited that someone was making D-bars again.

Good. You had me scared for a minute or three...