This is such an easy recipe, to take for the Morning Coffee Break...It is made with a Yellow Cake Mix, Instant Pudding, & Sour Cream, to help keep it Moist...It's "Melt In Your Mouth Yummy Goodness"!!!
In a separate bowl, mix together, with a fork, the brown sugar, sugar, flour, melted butter, & optional, nuts.
In a greased & floured 9x13 inch cake pan, place 1/2 of cake batter. Sprinkle, on top, 1/2 of cinnamon sugar mixture. Layer the rest of the batter & then the rest of the cinnamon sugar topping. You can take a butter knife & cut through the batter, length wise & width wise, to help distribute the topping mixture. This can, also, be baked in a Bundt Pan, too, ( though it may need to bake a little bit longer).
Bake for 35 minutes or until top springs back to touch or toothpick comes out clean.