2 c. sugar
2 c. flour
2 tsp. baking soda
2 tsp. baking powder
2 tsp. cinnamon
1 tsp. salt
1-1/2 c. oil
4 eggs
3 c. grated carrots
1 c. chopped walnuts

Icing:

8-oz. sour cream
1/2 c. butter
1 lb. box powdered sugar
2 tsp. vanilla
1 c. chopped walnuts

Mix dry ingredients together in a large bowl. Add remaining ingredients and stir 3 minutes. Pour into a well greased and floured 9 x 13 inch pan and bake at 350°F for 30-35 minutes. Cool cake. Prepare icing by mixing together sour cream, butter, powdered sugar and vanilla. Frost cake and sprinkle top with chopped nuts.