• Heat oven to 375 degree F. Coat a 12-cup muffin pan with nonstick cooking spray.

  • In a large bowl, whisk flour, baking powder, baking soda and salt. Set aside.

  • In another large bowl, beat butter and sugar until combined. Beat in eggs, banana and orange zest. Beat in flour mixture in 2 batches, alternating with half of the milk. Beat until just combined. Stir in raisins and nuts.

  • Spoon batter into muffin cups, about a generous 1/3 cup in each. Bake at 375 degree F for 20 minutes, or until a toothpick inserted into the center comes out clean. Let cool for about 5 minutes. Remove muffins from pan and cool on a wire rack.

  • Dust with confectioners sugar; serve.

  • Makes 12 muffins.