Icing Mix

I have this white frosting mix. [Link] powder
and I do not box with instructions.
What do you think would be necessary to do and how?

You do not need a lot of liquid.
Put softened butter in bowl and add the sugar and adding a little milk. Alternating between the 2 until you have as much as you want. Add vanilla at the end.

Here is a good recipe LOL
4 cups powdered sugar
3 tablespoons liquid (water, milk, coffee, lemon juice or orange juice)

Directions:

In a medium bowl, mix until smooth.

Adjust the consistency needed more sugar or liquid. It can be played on the bakery If a consignment is made thick.

Color choice. Store in an airtight container. Store in the refrigerator as long as one month, or four days at room temperature.

Have you any idea what brand is it? You can search on their site to see what to do.

You may add 1 tablespoon tablespoons milk. at a time until of spreading consistency.