Mom's Famous Cream Cheese Frosting

(This is a "Mom recipe" so most ingredients aren't measures. The amounts listed below are approximations but feel free to adjust as you like.) 2 lbs powdered sugar 2/3 c. shortening 2-3 tsp. vanilla 3 shakes of salt 1 brick of cream cheese (don't use fat free) canned milk (not the whole can... add until you reach the right consistency) Mix all ingredients together, adding milk until you reach the right consistency.