Thoroughly coat the Bundt pan with butter, then coat with flour, tapping out any excess flour. Set aside.
Cream together the butter and sugar with a stand or hand mixer until light and creamy.
Add eggs one at a time, until fully incorporated.
Add vanilla extract, baking soda and sour cream until well blended.
Sift flour and cornstarch together.
Reserve 1/2 cup flour mixture.
Add remaining flour mixture to liquid ingredients in 3 additions. The batter will be quite thick.
Toss the chocolate chips in the reserved flour mixture, this helps prevent the chips from all sinking to the bottom of the cake.
Fold chocolate chips into cake batter.
Pour batter into the Bundt pan, tap the pan on the counter to release air bubbles.
Bake at 325 degrees for 75-80 minutes until a cake tester inserted into the cake comes out clean and dry.
Let the cake cool in the pan for 30 minutes, then run a knife around the sides of the pan to loosen the cake. Invert onto a plate and release the cake.
Enjoy!
Notes
Make sure to butter and flour the Bundt pan thoroughly so the cake releases easily from the pan.
I have used light sour cream to cut down slightly on the calorie count and the results were still very delicious.