ITALIAN CREAM CAKE

Ingredients

• 4 ounces unsalted butter, room temperature
• 1/2 cup vegetable oil
• 2 cups sugar
• 5 egg yolks
• 1 teaspoon baking soda
• 1 cup buttermilk
• 2 cups sifted all-purpose flour
• 1 teaspoon vanilla
• 2 teaspoons orange liqueur
• 1 1/4 cups flaked coconut
• 3/4 cup chopped walnuts
• 5 egg whites
• 1/2 teaspoon cream of tartar
• 1 (8-ounce) package cream cheese, room temperature
• 1 (16-ounce) box confectioners sugar
• 1/2 cup finely chopped walnuts
• 1 tablespoon orange liqueur