Combine the 2 tablespoons of cake mix, cinnamon, brown sugar, and pecans; set aside.
In a large bowl, blend together the cake mix, sour cream, oil, water, eggs, and sugar. Beat on high speed for 2 minutes until smooth.
Pour 1/2 of the batter into the prepared pan.
Sprinkle the pecan mixture on top of the first layer of batter. Once done, pour the rest of the batter on top.
Bake at 375°F for 45 to 55 minutes or until a cake tester or toothpick inserted comes out clean. Cool in the pan for 25 minutes then invert onto a baking rack to cool completely.
Blend the icing/powdered sugar and milk together to make a glaze. Drizzle over cake. Enjoy!
Video
Notes
I used a butter pecan cake mix and it was AMAZING in this cake. You can use whatever flavour you like, but the classic cake mix is a golden or yellow cake mix.