1. In large mixing bowl, dissolve yeast in warm beer. Stir in whole wheat flour, rye flour, cornmeal, wheat germ, cocoa, molasses, butter, salt and 1-1/2 cups all-purpose flour until smooth. Stir in enough remaining all-purpose flour to form a stiff dough. Turn onto well-floured surface; knead for 5 to 6 minutes or until smooth and elastic. Transfer to greased bowl, turning once to grease top. Cover and let rise in warm place until doubled, about 1 hour.
2. Punch dough down; divide in half. Shape into 2 (6-inch) round loaves. Sprinkle with caraway seeds, if desired. Place on greased baking sheets. Cover and let rise in warm place until doubled, about 1 hour. Preheat oven to 350°F. Bake bread 40 to 45 minutes or until dark and crusty. Cool on wire rack.