5.0 dozen doughnuts
Dissolve yeast in warm water according to package instructions; set aside.
Place sugar, shortening, salt and hot water in bowl. Stir until shortening is melted and sugar is dissolved; cool to lukewarm. Add cream, egg, 3 cups flour and yeast to sugar-shortening mixture. Attach bowl and dough hook. Turn to speed "2" and mix 2 minutes.
Add remaining flour, 1/2 cup at a time, until dough clings to hook and cleans sides of bowl, about 5 minutes longer.
Place dough on lightly floured board and roll into a 10x24 inch rectangle. Using a sharp knife, cut dough into 2-inch squares.
In large heavy saucepan or deep fat fryer, heat oil to 360 degrees. Fry doughnuts, turning to brown on both sides, about 3 minutes.
Drain on absorbent towels and sprinkle with powdered sugar.