Cream butter, cream cheese and sugar until light and fluffy. Add salt and vanilla, beat well. Add eggs, one at a time. Beat well after each addition. Stir in flour. Spoon mixture into greased and floured 10 inch tube pan. Bake at 325 degrees about 1 hour and 15 minutes.
NOTE: Can make chocolate pound cake by sifting 1/2 cup cocoa with flour.