Whenever I have a recipe that calls for broth or bullion, I use those little bullion cubes and make my own. 1 cube + 1 cup water = 1 cup broth/bullion. (Yes, I know there is a difference in broth and bullion, but I don't really care. I use them interchangeably, here and in my cooking! nyeh!)
I tried for a while to simply heat the water with the bullion cube in the microwave, but the cube never dissolved completely. I was left trying to stir/crush the cube into the water - unsucessfully, usually.
One day, as I was cooking and ready to use my bullion cubes, I was having one of those cabinet-door-slamming-shut days. I reached for my bullion cube container from Sam's. I placed the cubes on the counter and picked up my rolling pin (not sure why it was out. also not sure why I even have one. I really only use it whack things.) I took my rolling pins and whacked the cubes.
After finding where the cube landed after flying out from under the rolling pin, I decided that something else might accomplish the job and be a little less dangerous.
I now, take a very hard (corningware, I think) flat-bottomed bowl and whack the bullion cubes I need to use. One good whack will pulverize the cube. It is now ready to drop into the water and microwave into perfectly ready broth/bullion/whatever.
And there's the bonus of getting to pound out some frustrations too! woo hoo!