1 (18.25 ounce) package yellow cake mix
1/2 cup pumpkin
1 tablespoon all-purpose flour
1/2 teaspoon baking powder
1/2 teaspoon baking soda
1 (16 ounce) package frozen whipped topping, thawed
1 cup chopped pecans
Preheat oven to 350 degrees F (175 degrees C). Grease and flour an 8x8 inch pan.
In a large bowl, mix pumpkin, flour, baking powder, baking soda and baking soda. Stir in the pecans. Spread onto the prepared pan.
Bake in the preheated oven for 30 minutes, or until a wooden toothpick inserted in the center of the cake comes out clean. Chill before serving.