Preheat the oven to 325°F. Grease the bottom only of 10-inch round tube cake pan.
In a large bowl, use an electric mixer to combine the butter, cream cheese and sugar until light and fluffy. Add the vanilla and salt. Add the eggs, one at a time, and beat after each addition. Gradually add the flour, ½ cup at a time.
Pour the batter into the prepared pan and tap the pan on the counter a few times to get rid of any air bubbles. Bake 1½hours or until done. Toothpick inserted should come out clean.
Serve slices topped with whipped cream and berries, if desired.
Notes
*Be sure to grease the bottom only of the pan- this will ensure that you have a smooth, even cake.