So today I finally made some hard tack for the first time. This is the recipe that I used. 4-5 cups of flour. 2 cups of water 3tsp of salt. mixed it all together, spread the dough out to about one half inch thick, poked holes in both sides and put in the oven at 350F for 30 minutes. I flipped the "bricks" over and cooked for another 30 minutes. Now they will sit on a tray for the next two days to "cure" or dry out even more so that I can vacuum seal them and try one for the first time.