Preheat oven to 325º F. Grease and flour a 10-inch Bundt cake pan.
Add baking soda and salt to sour cream and set aside.
Cream butter well. Add sugar gradually, beating well after each addition. Add eggs one at a time and beat well after each. Add sour cream mixture alternately with flour, beginning and ending with flour. Beat well after each addition.
Add vanilla and mix on low until just combined. Don't over mix.
Spread cake batter evenly into prepared Bundt pan and bake at 325º for one hour and a half, checking with a toothpick after baking for one hour 15 minutes.
Cool on a wire rack for 10 minutes before removing from pan.