In a bowl combine the powdered milk, 1 tablespoon of sugar, ½ teaspoon of salt, shortening, and hot water, stir until the sugar and salt are dissolved. Let cool. In a separate bowl combine the yeast and ⅛ teaspoon ofsugar in ⅓ cup of warm water and rest until yeast has dissolved. Add this to the dry milk mixture. Add the sifted flour and beat thoroughly with wooden spoon. Cover the bowl and let it rest in a warm spot for 30 minutes.
Preheat the griddle to 300 degrees F. (If you are using a regular griddle, put it on the stove burners on medium low.)
Add the remaining ½ teaspoon of salt to mixture and beat thoroughly. Place metal rings onto the griddle and coat lightly with vegetable spray. Place about ¼ cup batter into each ring and cover with a cookie sheet that has been sprayed with vegetable spray and cook for 5 to 6 minutes. Remove the cookie sheet and flip rings using tongs. Cover with the lid and cook for another 5 to 6 minutes or until golden brown. Place on a cooling rack, remove rings and cool. Split with fork, toast and serve.