Organic powdered sugar might sound like a healthier option for your homemade baked goods, but it comes with an unexpected downside that isn't worth it.
Thicken store-bought frosting by mixing in powdered sugar, 1 tablespoon at a time, until the desired consistency is reached. Whip it until fluffy: To make frosting fluffy, it needs to be aerated.
Make the icing Sift together powdered sugar and cocoa in a medium bowl. Set aside. Beat butter with a stand mixer fitted with the paddle attachment on medium speed until creamy, about 2 minutes.