For the cake:
1 Yellow Cake Mix
1 pkg. Vanilla Pudding
1/2 cup Oil
1 cup Sour cream
1/2 cup Sugar (I prefer brown sugar)
2 Tbl. Cinnamon
2 Tbl. Unsweetened Cocoa
1 cup of chopped nuts (Optional, but I use pecans)
In a small bowl, mix the cocoa, cinnamon and sugar. Set aside.
In a mixing bowl or stand mixer, combine cake mix, eggs, pudding, oil and sour cream until smooth. This mixture will be thick. Layer 1/2 of the cake mix in the bottom of a greased and floured 9x13 cake pan (I use the sugar mixture instead of flour). Spread 1/2 of the sugar mixture, and nuts if desired, over the cake mix. Layer the additional cake mix and remaining sugar mixture and add additional brown sugar to the top if desired. Run a butter knife across the width and length of the pan to create a swirl effect in the cake. Bake at 350 degrees for 50 to 60 minutes or until a toothpick comes out clean.