Sift together:

2 c. flour
2 tsp. baking soda
:
1 1/2 c. pumpkin
1 tsp. salt
2 tsp. cinnamon
:
1 c. chopped walnuts (optional)

Beat together until pale yellow in color.

3/4 c. Crisco oil
4 eggs
2 c. sugar
2 tsp. vanilla

To oil/sugar mix alternately add dry ingredients and pumpkin; beat well. Grease and flour 1/2 sheet sized cake pan. Spread batter in pan and sprinkle 1/2 cup chopped walnuts on top. Bake at 350 degrees for 45-50 minutes. Cool completely.

TOPPING:

1 lb. powdered sugar
1 tbsp. vanilla
1 stick butter
8 oz. softened cream cheese

Beat butter and cream cheese until fluffy. Gradually add powdered sugar. Spread on cake and sprinkle with remaining chopped walnuts.