1. Preheat oven to 350°. Whisk together first 5 ingredients in a large bowl. Make a well in center of mixture. Add buttermilk, eggs, and butter, whisking just until thoroughly blended. (Batter should be almost smooth.) Pour batter into 2 lightly greased 8 1/2- x 4 1/2-inch loaf pans.
2. Bake at 350° for 45 minutes. Rotate pans in oven, and shield with aluminum foil. Bake 30 to 35 minutes or until a long wooden pick inserted in center comes out clean. Cool in pans on a wire rack 10 minutes. Carefully run a knife along edges of bread to loosen from pans. Remove from pans to wire rack, and cool completely (about 1 hour).