Preheat oven to 300°F Fahrenheit

Beat butter and cream cheese until creamy

Gradually add sugar, beating well

Add eggs one at a time, beating well

Gradually add flour, beating well

Add salt and vanilla extract, make sure everything is well combined

Pour batter into a greased pan and smooth out the top

Bake for approximately 1 hour and 20 minutes or until toothpick inserted in the center comes out clean

Cool in pan for about 10-15 minutes, then remove from pan and let cool completely on a wire rack