Cranberry Christmas Cake

Prepare the Cake Layers: Preheat oven to 350°F with racks in center and lower third positions. Beat butter with a stand mixer fitted with a paddle attachment on medium speed until creamy, about 30 seconds. Gradually add sugar, beating until light and fluffy, 3 to 4 minutes. Add eggs 1 at a time, beating just until combined after each addition. Beat in orange zest just until combined, about 30 seconds. Set aside.

Whisk together flour, baking powder, cinnamon, salt, and baking soda in a medium bowl until well combined. Add flour mixture to butter mixture alternately with buttermilk, beginning and ending with flour mixture, beating on low speed just until combined after each addition. Fold in cranberries and vanilla using a rubber spatula until just combined.

Coat 3 (9-inch) round cake pans with baking spray. Line bottom of pans with parchment paper, and lightly coat with baking spray. Divide batter evenly among prepared pans. Bake 2 pans on center rack and 1 pan on lower rack in preheated oven until a wooden pick inserted in centers of cake layers comes out clean, 20 to 22 minutes. Let cool in pans on wire racks 10 minutes. Remove from pans, and let cool completely on wire racks, about 1 hour.

Prepare the Orange Buttercream: Beat butter, cream cheese, and salt with a stand mixer fitted with a paddle attachment on medium speed until creamy, 1 to 2 minutes. Gradually add powdered sugar alternately with orange juice, beating on low speed until combined and smooth after each addition. Beat in vanilla. If desired, beat in milk, 1 teaspoon at a time, until Orange Buttercream reaches desired consistency.

Assemble the cake: Place 1 cake layer on a platter or cake stand; spread top with about 1 cup Orange Buttercream. Add second cake layer; spread top with about 1 cup Orange Buttercream. Top with third cake layer; frost top and sides with remaining Orange Buttercream. Decorate with desired garnishes.