Icing (cream cheese icing?)

1 box powdered sugar (1 lb)
1 stick butter
1 package cream cheese (light or neufchatel) (8 oz)
1 tsp vanilla

2 tbsp milk

Beat butter and cream cheese together, until blended. Slowly mix in powdered sugar. Beat until fluffy. Add vanilla and milk.
Source: same recipe card as "world's best chocolate cake," from Mom