1/2 brick of cream cheese (4 oz/115 gms)
2 tbsp milk
1/2 tsp vanilla
2-3 cups of powdered (icing) sugar
In bowl, beat cream cheese until smooth.
Add milk and vanilla and beat on low until combined.
Add powdered sugar and beat until you've reached the consistency you like. (I like it a little bit more thin for cinnamon rolls than for something like carrot cake.)