This is fabulous challah, perfect for Friday Night, or Rosh Hashanah or anytime you want a great whole-wheat bread that is moist, and slightly sweet. I use stone-ground whole-wheat flour or white wholewheat flour (that I get from King Arthur Flour). White whole-wheat flour is sweeter but just as nutritious. If you want to up the whole-wheat flour, go ahead and make it all whole-wheat (no white flour). Just make sure you let the dough rest more, to allow the bran and germ in the whole-wheat flour to absorb the moisture in the dough.