Pull the bones out and put them in the pot you will let them simmer in.
Use a low-IBU beer and preferably a dark ale or non-sweet porter (a nice lager will work well too).
Pour in enough beer(s) to almost top-off the pot of roasted bones.
Turn the heat to medium until you’ve reached a rolling boil.
Rotate things a bit (stir it all up) and turn the heat down to low for the long-haul.
Rotate the bones / Stir up the bones and meat-ish stuff every few hours as they simmer (meat-ish is the fat, marrow, ligaments, and actual meat remnants).
After about 24-hours, let the pot rest for a few minutes to allow the fat (clear-ish liquid) to float to the top of the broth mixture.
Skim off as much of the fat as you can and keep for future sautéing and searing. There will be some fat remaining and that’s A-OK; we want that fat to remain.
Remove as many bones as you can find from the mixture.
Using a strainer, strain out the broth mixture to a bowl in order to separate the meat-ish stuff from the pure broth.
Once the liquid starts to rise to the bottom of the colander / strainer, fill the first jar with the pure broth.
If you have a manageable amount of weight (pot and broth mixture remaining), pour the mixture over the colander / strainer, and catch the pure broth in the bowl.
Pour the pure broth into hot-liquid-tolerant jars for storage. More of the fat will rise to the top and create that “fat-cap.”
Press out the remaining meat-ish stuff to get as much of the pure bone broth out as you can. Add this to your pure broth jars.
You are Essentially Done here, and the following steps are optional. I like to “Wash” the meat-ish stuff with a couple of beers to get more of the broth and flavor out of the mixture. Take a bowl large enough to hold about 2 beers and the remaining meat-ish stuff.