Alisa's Notes:
I tested this spiced buttercream frosting recipe with Earth Balance Soy-Free Buttery Sticks, Nutiva Shortening, So Delicious Unsweetened Coconut Milk Beverage, and Simply Organic Spices.
Sarah waffled on whether the salt should be ⅛ teaspoon or ¼ teaspoon since her son liked the greater amount. If serving immediately, I would definitely do just ⅛ teaspoon. If you are making this frosting ahead, and you like a little more flavor contrast and depth, you can up the salt to a scant ¼ teaspoon. The salt will have more time to meld and enhance the spices in this case.