Ingredients 2 1/2 cups all-purpose flour 2 teaspoons baking powder 1/2 teaspoons baking soda 1/2 teaspoon salt 3/4 cup (1-1/2 sticks) plus 6 tablespoons butter, softened 1 1/4 cups granulated sugar 3 eggs 1 1/2 teaspoons Pure Vanilla Extract, 4 Oz. 1 1/2 teaspoon lemon zest 1 1/2 teaspoon lime zest 1 1/2 teaspoon orange zest 1 cup orange juice 1/4 cup solid vegetable shortening 2 cups (about 1/2 lb.) sifted confectioners' sugar 1-2 tablespoons orange liqueur (optional) 1 jar (10 oz.) lemon curd 1-2 tablespoons lime juice Tools 1 Easy Layers 5-Piece Layer Cake Pan Set, 6-Inch 1 Easy Layers 5-Piece Layer Cake Pan Set, 6-Inch Instructions Click to mark complete - Cake Preheat oven to 325°F. Prepare pans with vegetable pan spray. - In large bowl, stir together flour, baking powder, baking soda and salt. Set aside. In large bowl, beat 3/4 cup (1 1/2 sticks) butter and sugar with electric mixer until light and fluffy. Add eggs one at a time, mixing well after each. Add vanilla and 1 teaspoon of each citrus zests; mix well. Add flour mixture alternately with orange juice, beating until just combined. Divide evenly into pans. - Bake 18-21 minutes, rotating pans half way between baking. Cakes are done when toothpick inserted in center comes out clean. Cool 5 minutes on cooling grid; remove from pans and cool completely. - Filling For filling, beat shortening and 6 tablespoons butter in large bowl with electric mixer until light and fluffy. Gradually add sugar, one cup at a time, beating well on medium speed. Scrape sides and bottom of bowl often. When all sugar has been mixed in, icing will appear dry. Add 1/2 teaspoon of each citrus zests, juice and, if desired, liqueur; beat at medium speed until light and fluffy. - Assemble To assemble, cut the crowns off of each cake layer. Place first layer on cake board or serving plate. Spread a layer of icing to edges of cake. Top with second cake. Spread a thin layer of lemon curd to edges. Repeat, alternating layers of icing and lemon curd. On top cake, spread a layer of icing, followed by a layer of lemon curd.