Ingredients
1/2 cup butter, softened
1/2 cup shortening*
4 cups powdered sugar
3 tbsp milk
1 tbsp vanilla paste or extract or 1 vanilla bean
*You can substitute butter for the shortening. The taste and texture won't be exactly the same, and it definitely won't hold up in heat (like, being outside on a hot day) like the shortening version.
Preparation
