Barb's Pumpkin Cake

2 cups sugar
1 cup vegetable oil
4 large eggs
2 cups all purpose flour
2 tsp baking soda
2 tsp ground cinnamon
½ tsp ground ginger
1 tsp baking powder
½ tsp salt
2 cups pumpkin puree


Combine sugar, vegetable oil, and eggs in a large mixing bowl; mix well. Sift dry ingredients into a separate bowl; stir into oil mixture, beating well. Stir in pumpkin puree. Pour batter into greased and floured 13X9 pan. Bake at 350 degrees for 35- 40 minutes.
Frost with whipped cream cheese icing and sprinkle with chopped walnuts