Pumpkin Spice Bars

For the bars:



3/4 cup granulated sugar

1/4 cup margarine, at room temperature

1 large egg, at room temperature

3/4 cup canned pumpkin

1 teaspoon vanilla extract

1 1/4 cups all-purpose flour

1/2 teaspoon baking soda

1/2 teaspoon salt

1 teaspoon ground cinnamon

1/2 teaspoon ground ginger

1/2 teaspoon ground cloves

1/4 cup chopped walnuts



For the Spice Frosting:

1/4 cup brown sugar

3 tablespoons butter or margarine

2 tablespoons milk

1/4 teaspoon ground cinnamon

1/4 teaspoon ground ginger

1/4 teaspoon ground cloves

1/4 teaspoon vanilla

1 cup powdered sugar, sifted