in a bowl, dissolve yeast and 1 tsp sugar in warm water; let stand for 5 minutes. In a mixing bowl, cream butter, shortening, salt and remaining sugar. Add boiling water; cool to 110 degrees, Add yeast mixture and eggs;mix well, Stir in enough flour to form a soft dough, turn onto a floured surface; knead until smooth and elastic, about 6-8 minutes. Please in a greased bowl, turning once to grease top. Cover and let rise in a warm place, until doubled, about 1 hour.
Punch dough down, Turn onto a lightly floured surface; divide into thirds. Divide each portion into nine pieces; shape into balls. Place in three greased 9 inch round baking pans. Cover and let rise until doubled, about 30 minutes. Bake at 350 for 20-25 minutes or until golden brown. Cool in pans on wire racks.