In a large bowl, using a hand-held mixer or whisk, combine cake mix, eggs, vegetable oil, water, and sour cream. Mix together until no lumps remain
Pour cake batter over top of the pecan topping. Use a spatula to make sure the batter is spread out evenly and completely covers the pecan topping
Bake in preheated oven for 40-45 minutes, or until a toothpick or cake tester stick inserted comes out clean
After the cake is finished baking, remove bundt pan from oven and place on a cooling rack to cool for 10 minutes. Do not attempt to flip the pan before this!
Once 10 minutes have passed, place a large plate over the top of the bundt pan to invert the cake onto the plate. I like to bang the top of the pan a few times before I lift it up to make sure those loose pecans unstick from the pan
Slice and serve warm with your favorite ice cream, or allow the cake to cool and serve at room temperature