Step #1
Preheat the oven to 325F degrees F (165 degrees C).
Step #2 Dissolve yeast in warm water until foamy, about 10 mins.
Step #3 In a large bowl, whole wheat, & rye flours with the bulgur, stir this together the all-purpose, cornmeal & powdered milk.
Step #4 Stir in the yeast mixture, salt & chicken broth to form a stiff dough.
Step #5 Add more broth if necessary to hold dough together.
Step #6 Roll dough out to 1/4 inch thickness on a lightly floured surface.
Step #7 Cut into desired shapes using a cookie cutter.
Step #8 Place biscuits 1 inch apart onto an ungreased cookie sheet.
Step #9 Combine the egg & milk; brush onto the tops of the biscuits.
Step #10 Bake in the preheated oven for 45 mins, then turn off the oven & let the biscuits sit in the closed oven overnight to become extra hard & crunchy.