In a medium-size mixing bowl, whisk together the pumpernickel, cornmeal, whole wheat, baking soda, salt and currants. In a separate bowl, beat the buttermilk and molasses together till smooth. Add the wet ingredients to the dry ingredients and mix till ju
Spoon the batter into a lightly greased 8 1/2 x 4 1/2-inch loaf pan, and cover it with buttered aluminum foil, fastening the foil tight to the edges of the pan (so the bread will steam a bit), but ballooning it in the center, so the bread has room to expa
Bake the bread in a preheated 325°F oven for 1 hour. Remove the foil (the middle may be slightly sunken; that's OK), and bake for an additional 10 minutes.