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.
To make the frosting: Begin by melting the butter slowly ... then set aside to cool down. Mix together the powdered sugar, milk, cooled-down butter and vanilla extract until you have a fluffy ...
Let cool completely on the baking sheets. For the icing: Beat the powdered sugar and egg whites in a large bowl with a mixer on low speed until combined. Gradually beat in the water until the ...
The chai spice and eggnog don't come in until later, as they're added to the icing, along with powdered sugar, more vanilla, and milk. It's worth noting that these cookies aren't a quick recipe ...