Step 1

I recommend using standing mixer if you have one. Also, fit the mixer with a whisk attachment.

Step 2

Cream together the sugar free powdered sugar and the butter by mixing on low for one minute. Once these appear to be somewhat blended you can increase the speed to medium to get a more whipped texture. It should take about 2 1/2- 3 minutes to get a good texture.

Step 3

Scrape the sides of the bowl by hand and then add the milk (or alternative)and the vanilla. Start with 1 tablespoon of the milk and add more as needed. Continue to mix on medium for 1- 1 1/2 minutes or until you get that desired consistency.