Put oven rack in middle position and preheat oven to 350 degrees F. Put liners in muffin cups or grease them.
Whisk together dry ingredients in a bowl.
Combine the wet ingredients in another bowl with an electric mixer.
Add the dry ingredients to the wet ingredients and mix until smooth. Fold in nuts and raisins.
In another small bowl, stir together cinnamon and powdered sugar.
Divide batter among muffin cups (each should be about three-fourths full), then sprinkle tops with cinnamon-sugar mixture.
Bake until puffed and golden brown and wooden pick or skewer inserted into the center of a muffin comes out clean, about 25 to 30 minutes.
Cool in pan on a rack 5 minutes, then transfer muffins from pan to rack and cool to warm or room temperature
at 2:23 PM on Oct. 26, 2009