1Heat oven to 350°F. Place paper baking cup in each of 12 regular-size muffin cups; spray paper cups with cooking spray.
2In large bowl, beat buttermilk, oil, molasses and egg with fork or wire whisk until well mixed. Stir in flour, brown sugar, baking soda, orange peel and salt just until moistened (batter will be lumpy). Stir in walnuts and dates. Divide batter evenly among muffin cups, filling full.
3Bake 25 to 30 minutes or until golden brown and toothpick inserted in center comes out clean. Immediately remove from pan to cooling rack. Serve warm or cool.