Four Layer Chocolate Dessert

1 stick margarine
13 oz cool whip
1 c. flour
2 pkg. instant chocolate pudding
½ c. chopped nuts
3 c milk
8 oz. cream cheese
l c powdered sugar
chopped pecans for garnish

Melt margarine, add flour and chopped nuts. Pour in to 9 x 13 pan. Bake at 375 for 15 minutes. Cool completely. Cream together softened cream cheese, powdered sugar, and 1 cup Cool Whip. Spread over the first layer. Prepare chocolate pudding with milk, mix 2 minutes and pour over second layer. Spread rest of Cool Whip on top. Sprinkle with pecans, chill several hours before serving. Cut in squares.