Sponge Starter (Begin 2 to 16 hours ahead)
1 cup (8 ounces) cool to lukewarm water, preferably spring water (90 to 100°F)
1/2 teaspoon active dry or instant yeast
1 1/4 cups (5 1/4 ounces) King Arthur Unbleached Bread Flour
1/4 cup (1 ounce) King Arthur White Whole Wheat or Traditional Whole Wheat Flour

Dough
All of the sponge starter (above)
1 cup (8 ounces) lukewarm water, preferably spring water (l00 to 115°F)
3/4 teaspoon active dry or 1/2 teaspoon instant yeast
1 tablespoon sugar
3 3/4 to 4 cups (1 pound to 1 pound 1 ounce) King Arthur Unbleached Bread Flour
1 to 1 1/2 teaspoons salt