In a mixing bowl, mix the powdered sugar, margarine, and salt with a hand mixer until creamy, about 2 minutes. Start with the hand mixer on low speed to avoid powdered sugar clouds. Increase it to medium speed once the sugar is mostly incorporated.
Gradually beat in 1 tablespoon of milk beverage and the vanilla until combined. Optionally mix in the additional 1 tablespoon of milk beverage to reach your desired consistency.
To Assemble the Melting Snowman Cookies
Frost a cookie with vanilla frosting.
Place a large marshmallow in the center of the cookie.
Wrap a fruit strip "scarf" around the "neck." You may need to fold the "scarf" in half so it doesn't cover the snowman's face.
Draw a face on the marshmallow with black frosting or a black food marker.
Draw a carrot nose with orange frosting or an orange food marker.
Tuck two pretzel stick halves on the sides of the snowman head under the edges of the scarf.
Recipe by Go Dairy Free at https://www.godairyfree.org/recipes/dairy-free-melting-snowman-cookies