Bars:

Pre-heat oven to 350 degrees. Grease 15 x 10 x 1 inch jelly roll pan.

Combine all bar ingredients, except nuts and raisins in a large bowl. Beat at low speed until moistened then 2 minutes at medium speed. Stir in nuts and raisins.

Pour into greased pan.

Bake at 350 for 25-30 minutes or until toothpick inserted in center comes out clean. Cool completely.

Frosting:
Combine all frosting ingredients in a small bowl and beat until smooth. Spread over bars and store in refrigerator.