Combine all ingredients in a large bowl; mix well; Roll the dough out to size of a cookie sheet; Pat the dough onto a lightly greased cookie sheet, bringing it to the edges. Using a sharp knife or a pizza cutter, cut desired sizes into dough (just score through). If you're using as training treats, cut them into small pieces; Sprinkle a little extra cheese and garlic powder if desired on dough for flavor. Bake in a 350 degree oven about 15 minutes until golden brown. Turn off the oven and let cool for a few hours; They will keep hardening the longer you leave them. Break them apart; store tightly covered or in the freezer.