Orange Chiffon Cake

Ingredients

• 2 1/4 cups cake flour, sifted
• 1 1/2 cups granulated sugar
• 1 Tablespoon baking powder
• 1 teaspoon salt
• 1/2 cup vegetable oil
• 5 large egg yolks, beaten
• 3/4 cup orange juice
• 1 1/2 Tablespoons orange juice
• 3 Tbl freshly grated orange zest
• 1 cup egg whites
• 1/2 teaspoon cream of tartar
• 5 Tbl unsalted butter, melted
• 1 1/2 Tbl heavy cream
• 3 cups confectioners' sugar, sifted

Directions

1. Heat oven to 325 degrees F.
2. Sift the flour, granulated sugar, baking powder, and salt together in a large bowl.
3. Make a well in the center of the flour mixture and add the oil, egg yolks, 3/4 cup orange juice, and 2 tablespoons of the zest.
4. Whisk until smooth and set aside.
5. Beat the egg whites and cream of tartar using a mixer set on medium-high speed until stiff peaks form.
6. Gently fold the egg whites into the batter until just combined. Pour the batter into a 10-inch tube pan and bake for 55 minutes.
7. Increase oven temperature to 350°F and continue to bake until a wooden skewer inserted into the middle of the cake comes out clean -- 10 to 15 minutes.
8. Invert pan over a funnel and cool completely. Unmold cake by running a knife around the pan sides.
9. To make the frosting: Combine the butter, heavy cream, and remaining 1 1/2 tablespoons orange juice and 1 tablespoon zest together in a large bowl. Add the confectioners' sugar gradually, using a mixer set on medium speed, until fluffy. (If necessary, add 1 or 2 additional tablespoons of cream to adjust frosting consistency). Spread frosting over the entire cake.