Cream 2 sticks butter with 1 stick of butter. Add 1 (8 ounce) package of cream cheese and 3 cups of sugar. Continue to cream mixture. Add 6 eggs, one at a time. Sift 2 teaspoons baking powder and 3 cups of flour and a pinch of salt. Add to creamed mixture. Add 1 teaspoon vanilla. Flour and grease Bundt pan. Bake at 300 degrees for 1 hour and 15 minutes. This is one of the best pound cakes I have ever eaten.