Combine yeast, sugar and warm water and proof (10 - 15 minutes).
Once yeast has proofed, add 2 cups of All Purpose Flour. Then add salt, powdered buttermilk and melted butter. Add remaining flour one cup at a time until dough is too stiff to stir.
Pour dough out onto a floured work surface and knead in remaining flour. Continue to knead for a total of 7 minutes. Dough should be supple and have a satiny appearance. Place the dough in an oiled bowl and turn to coat. Cover and set in a warm place to rise until doubled in bulk, about 1 - 2 hours.
Preheat oven to 375°F. Pinch off pieces of dough and form rolls by rolling dough in lightly oiled hands. Place dough balls onto a lightly oiled baking sheet and bake 18 - 20 minutes. Serve warm.