Orange zest lends a delicate floral, citrus flavor to this delightfully crisp and light shortbread cookies. Finished with a vibrant orange and cream cheese frosting, they’re the perfect treat to deliver a taste of sunshine on a chilly winter day.
Meanwhile, prepare the Orange-Cream Cheese Frosting: Beat together cream cheese and butter with an electric mixer until light and fluffy. Gradually add powdered sugar, and beat well. Beat in zest and juice. Beat in 1 to 2 drops orange food color gel, if desired. Use immediately.
Spread about 1 tablespoon frosting on each cooled cookie, using a small offset spatula.
Bake, in batches, in preheated oven until lightly browned on bottom and around edges, 11 to 13 minutes. (Refrigerate second batch while baking first batch.) Cool on baking sheet 2 minutes. Transfer to a wire rack, and cool completely (about 30 minutes).