errrrrrr…………
as someone said, pure caffeen is fairly deadly stuff, do you have scales that can weigh out 200mg (you know thats nearly as much as 2 average shots of expresso or 4 instant coffee’s dont you?) , are they calibrated (expensive to do), and do you trust them? If yes then the safest way is to add 200mg to each bar individualy to ensure the distribution is even.
Theres a reason people do degrees in chemical/process engineering so that they can do stuff like that. Even then granulation (the mixing procedure for making tablets where you’ve got one very small component and lots of bulking powder/cake) is still a case or trial and error to get it right. Then you’ve stil got a big bucket full of what looks like crumble mixture, but most of the caffeen will either be in the bigger lumps, or the smaller ones, or somewhere in the middle. Do you have a riffler to make sure you get even ammounts of each size into each bar?
Stick with tablets, at least you’ll know that theyr (hopefully) consistent. And if you have a major problem your energy bars will still be edible while you wait for mountain rescue, rather than leaving you a gibbering, caffeen fueled, dehydrated muppet.