Preheat oven to 325°F (160°C). Generously grease a 12-cup tube or Bundt pan.
Whisk together the flour, salt, and baking soda. Set aside.
Using an electric mixer on medium speed, beat the butter, sugar, and brown sugar until light and fluffy. Add the eggs, two at a time, mixing well after each addition. Mix in the vanilla.
Reduce mixer speed to low. Add the flour mixture in three portions, alternating with two portions of sour cream.
Transfer the batter to the prepared pan, and spread evenly. Bake 80 to 90 minutes, or until the top is golden brown and a pick inserted into the center comes out clean.
Cool in the pan for 15 minutes. Then remove the cake from the pan to finish cooling.**
Garnish, if desired, with sweetened whipped cream and berries, or use your favorite toppings.
Notes
*Substitute almond extract or your favorite extract for some variety. A combination of vanilla and almond is nice, too.
**If you used a tube pan, you will likely want to flip the cake out of the pan and then flip it again so that fantastic crust is right side up.
Store in an airtight container at room temperature up to 5 days.