In bowl of stand mixer fitted with paddle attachment, cream together stick of Earth Balance and Daiya Cream Cheese Style Spread. Blend on medium until well incorporated.
One cup at a time, mix in powdered sugar with mixer on low. Add another cup only after the first is incorporated.
Once all powdered sugar is mixed in, add vanilla.
Slowly, a teaspoon at a time, add in non-dairy milk until frosting is the consistency you prefer.
With mixer on medium-high to high, mix frosting until it is light and fluffy.
This frosting is best kept refrigerated. It did hold up well in temperatures in the high 80s outdoors, but I wouldn't recommend it, especially if you are a heavy froster like me.