You’ll Need:? pound whole-wheat flour 1 cup coarse-ground zwieback crumbs 1 cup and 2 tablespoons lukewarm water 1 cake compressed yeast 1 teaspoon salt 1/3 cup sugar 3 tablespoons cooking oilDirections : To prepare this Crumb Buns Recipe, first mix the crumbs and flour. Dissolve the yeast in the water;