Originally Posted by Ron_L
Most people figure about a 50% yield, so if you start out with a 15 lb brisket you'll end up with 7.5 lbs of cooked meat after trimming and loss during cooking. You may get more than that, but that's a good number to use.
Also, if the only meat is the brisket I'd figure 1/3 lb per serving, so a 15 lb brisket will yield around 22 servings.
This estimation is spot on for how many servings will yield. And if you mom thinks that you are cooking too much meat, tell her that you want to make sure you have leftovers than not enough. I'm 100% positive some people will want to take some home.
Also for best results do 2 seperate cooks. If you want some sleep do hot and fast cooks if it is dinner. If it is lunch, do a low and slow overnight cook.