I made this last Saturday and took it to church for our Sunday School class to enjoy. This was very, very good and very easy to make.
For the cake:
1 yellow cake mix
1 (16 oz.) can solid packed pumpkin puree
1/4 cup butter, softened
For the Streusel:
1 cup brown sugar
2 teaspoons cinnamon
1/3 cup butter, softened
1 cup quick oats OR 1 cup chopped pecans
Preheat oven to 350 degrees. Combine the streusel ingredients and set aside. Blend the cake mix, eggs, pumpkin puree and butter. Beat at medium speed for 3 minutes. Pour half of the cake batter into a greased 9 x 13 inch pan. Sprinkle with half of the streusel and spread the remaining batter over that. Sprinkle the top with the rest of the streusel. Bake for about 35 minutes or until a toothpick inserted in the center comes out clean.