Add the ingredients to a standing mixer and mix on low speed for 1 minute. Starting slowly will help to prevent the powdered sugar from flying everywhere.
Gradually increase the speed of the mixer.
If you are using an electric mixer, add your ingredients to a large mixing bowl. Put the beaters into the handheld mixer and start on low speed.
Whip the frosting for 2-3 more minutes until it is fluffy and light.
Cover the bowl with plastic wrap and allow it to sit in the refrigerator for 15 minutes to cool.
Add it to a piping bag and have some fun with this gluten free frosting!
Notes
Many ask if powdered sugar is gluten free. In most cases it is but always read the label to be sure.
You can use shortening instead of butter if you prefer.
Use regular milk or non-dairy milk.
This frosting will keep for up to 3 days in an air-tight container in your refrigerator.
You can freeze this frosting easily. Put it into a freezer bag and squeeze the extra air out. To use the frosting, allow the frosting to thaw then put it into a piping bag.