In a blender, combine the oil, honey, raisins, 1/4 cup brown sugar and boiling water; cover and process until smooth. Cool to 120°-130°. In a large bowl, combine the whole wheat flour, 2 cups all-purpose flour, 1 cup rye flour, milk powder, yeast, salt and remaining brown sugar. Add raisin mixture and warm water; beat until smooth. Stir in enough remaining all-purpose and rye flour to form a soft dough.
Turn onto a surface floured with all-purpose flour; knead until smooth and elastic, about 6-8 minutes. Place 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 fourths. Shape into four round loaves. Sprinkle greased baking sheets with cornmeal; place loaves on prepared pans. Let rise until doubled, about 30-45 minutes.
Bake at 350° for 25-35 minutes or until bread sounds hollow when tapped. Remove from pans to wire racks. Brush with butter; cool.
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