Good Eats: Pumpkin Spice Bars with Cream Cheese Frosting

I stumbled upon this recipe for the first time last year, and had forgotten all about it until recently. I made these bars twice last fall, and they were excellent! I'm looking forward to making these pumpkin bars sometime soon!

Recipe for: Pumpkin Spice Bars with Cream Cheese Frosting
From: Betty Crocker Fall Baking

Ingredients:
Bars
4 eggs
2 cups granulated sugar
1 cup vegetable oil
1 can (15 oz.) pumpkin (not pumpkin pie mix)
2 cups Gold Medal all-purpose flour
2 teaspoons baking powder
1 teaspoon baking soda
1/2 teaspoon salt
2 teaspoons ground cinnamon
1/2 teaspoon ground ginger
1/4 teaspoon ground cloves
1 cup raisins, if desired

Cream Cheese Frosting
1 package (8 oz.) cream cheese, softened
1/4 cup butter or margarine, softened
2 to 3 teaspoons milk
1 teaspoon vanilla
4 cups powdered sugar
1/2 cup chopped walnuts, if desired

Directions:
1. Heat oven to 350 degrees. Spray 15 x 10 x 1 inch pan with cooking spray.
2. In large bowl, beat eggs, granulated sugar, oil, and pumpkin with wire whisk until smooth. Stir in flour, baking powder, baking soda, salt, cinnamon, ginger, and cloves. Stir in raisins. Spread in pan.
3. Bake 25 to 30 minutes or until toothpick inserted in center comes out clean and bars spring back when touched lightly in center. Cool completely, about 2 hours.
4. In medium bowl, beat cream cheese, butter, milk, and vanilla with electric mixer on low speed until smooth. Gradually beat in powdered sugar, 1 cup at a time, on low speed until smooth and spreadable. Spread frosting over bars. Sprinkle with walnuts. For bars, cut into 7 rows by 7 rows. Store covered in refrigerator. Makes 49 bars.