1Pre-heat your oven to 325 degrees Fahrenheit (165 degrees Celsius).
2Prepare a 10-inch (25 cm) two-piece tube pan by leaving it ungreased and ensuring it's not nonstick.
3Separate seven large egg yolks (120 grams) and eight large egg whites (240 grams) when cold, then cover and bring them to room temperature (about 30-60 minutes).
4Wash two oranges, then grate two tablespoons (10 grams) of orange zest, avoiding the white pith.
5Cut the oranges in half and squeeze to get half a cup (120 milliliters/120 grams) of freshly squeezed orange juice, straining out any pulp or seeds.
6In a stand mixer with the paddle attachment (or a hand mixer/by hand), combine 2 cups (240 grams) of cake flour, 1 cup (200 grams) of granulated white sugar, 2 teaspoons (8 grams) of baking powder, and half a teaspoon (2 grams) of salt.
7Add the prepared orange zest to the dry ingredients.
8Beat the dry ingredients on low speed to mix everything together.
9Make a well in the center of the dry ingredients.
10Pour in the half cup of orange juice, the seven large egg yolks, one teaspoon (4 grams) of pure vanilla extract, and half a cup (120 milliliters/120 grams) of a flavorless oil.
11Beat the wet and dry ingredients together on medium-low speed for about one minute until just combined.
12Transfer the batter to a nice wide bowl and wash the mixing bowl.
13Using the whisk attachment, beat the eight large egg whites (at room temperature) in the clean mixing bowl.
14Add half a teaspoon (2 grams) of cream of tartar to the egg whites.
15Beat the egg whites on medium-low speed until they reach soft peaks and you see tracks of the whisk.
16Increase the speed to medium-high and gradually add half a cup (100 grams) of granulated white sugar, beating until the whites are fluffed, shiny, glossy, and have stiff peaks.
17Ensure the sugar is completely dissolved in the meringue by rubbing a small amount between your fingers; beat a little more if grainy.
18Add a small amount of the meringue to the batter to lighten it, mixing it in with big strokes, making sure to get to the bottom of the bowl.
19Add about half of the remaining meringue to the batter and gently fold it in, turning it up and over.
20Add the rest of the meringue to the batter and continue to gently fold until just combined, ensuring not to deflate the whites.
21Pour the batter into the ungreased tube pan and gently shake to even it out.
22Run a wooden skewer through the batter in circles to remove any large air bubbles.
23Bake for 55 to 60 minutes, or until the cake is golden brown, set, springy to the touch, and a wooden skewer inserted comes out clean.
24Immediately upon removal from the oven, invert the pan and place the center core onto the top of a glass to cool completely (about 1.5 hours) until the pan is at room temperature.
25Once completely cool, prepare a wire rack by lightly buttering or spraying it, or using a flavorless oil.
26Take a flat edge and run it around the outside of the cake in the pan, then around the inner core.
27Push up on the bottom of the pan to release the cake, then run the flat edge along the bottom to fully release it.
28Invert the cake onto the prepared wire rack.
29Allow the cake to dry out a little before glazing.
30To make the orange glaze, sift 2 cups (240 grams) of confectioner sugar into a bowl.
31Add one tablespoon (13 grams) of melted butter and one teaspoon of lemon juice to the confectioner sugar.
32Start by adding 1.5 tablespoons of orange juice and stir, then add another tablespoon of orange juice (total 2.5 tbsp) until a pourable consistency is achieved.
33Add one tablespoon (5 grams) of freshly grated orange zest to the glaze and mix.
34Place the cake on a wire rack over a baking sheet.
35Pour the orange glaze over the top of the cake, ensuring the entire top is covered and allowing it to drip down the sides.
36Let the glaze finish dripping and firm up.
37Gently transfer the cake to a serving plate using a large spatula.
Ingredients
7 large egg yolks
8 large egg whites
2 tbsp orange zest
0.5 cup freshly squeezed orange juice
2 cups cake flour
1 cup granulated white sugar
2 tsp baking powder
0.5 tsp salt
1 tsp pure vanilla extract
0.5 cup flavorless oil (corn, vegetable, canola, safflower)