White Cake with Orange Curd

Ingredients

• CAKE
• 2 ¾ C. cake flour
• 2 tsp. Clabber Girl® Baking Powder
• ½ tsp. salt
• ½ C. unsalted butter, softened
• ¼ C. Crisco® All-Vegetable Shortening
• 1 ¾ C. granulated sugar
• 1 tsp. Spice Islands® Pure Vanilla Extract
• 1 tsp. Spice Islands® Orange Peel
• ¾ C. buttermilk
• 6 egg whites
• 6 egg yolks
• ½ C. granulated sugar
• Zest of 1 orange
• ¼ C. fresh orange juice
• ¼ C. lemon or lime juice
• 4 Tbsp. unsalted butter, cut into pieces
• 1 ½ C. butter, softened
• 3 tsp. orange zest
• 3 Tbsp. buttermilk
• 4 ½ C. powdered sugar, sifted