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1
Combine the warm water, honey, and yeast in a large liquid measuring cup, stirring until the yeast dissolves.
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2
Let stand until foamy, about 5 minutes.
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3
In a large bowl, whisk 1 pound 5 ounces (about 4 cups) bread flour with the whole-wheat flour, wheat germ, and salt.
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4
Make a well in the center.
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5
Pour in the yeast mixture, and stir with a wooden spoon, gradually drawing in the dry ingredients until combined.
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6
Turn out the dough onto a lightly floured work surface.
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7
Gently knead in the remaining 3 ounces (about 1/2 cup) bread flour a little at a time until dough is smooth and elastic, 10 to 15 minutes.
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8
Place in a lightly oiled bowl; cover with lightly oiled plastic wrap.
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9
Let rise in a warm place until doubled in bulk, 1 to 1 1/2 hours.
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10
Preheat the oven to 400F, with the rack in the center.
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11
Brush two 9-by-5-inch loaf pans with oil.
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12
Punch down the dough with your fist, then turn it out onto a lightly floured work surface.
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13
Divide dough in half.
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14
Flatten one half into an oval approximately the length of the pan, and roll up lengthwise, gently pressing as you go to form a tight log.
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15
Place the log, seam side down, into a prepared pan.
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16
Repeat with remaining dough.
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17
Cover loaf pans with oiled plastic wrap.
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18
Let rise in a warm place until doubled in bulk, 30 to 45 minutes.
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19
Using a lame or a razor blade, slash the loaves down the center in one quick, even motion.
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20
In a small bowl, beat the egg yolk with the heavy cream, and brush over the tops of the loaves.
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21
Bake, rotating pans halfway through, until bread is deep golden brown, 50 to 60 minutes.
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22
(If the tops are browning too quickly during the last 30 minutes of baking, tent with aluminum foil.)
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23
Transfer pans to a wire rack, and let cool 5 minutes.
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24
Turn out the loaves onto the rack to cool completely before serving.