Preheat your oven to 350°F (175°C). Grease a Bundt pan generously with butter and dust it with flour to ensure the cake releases smoothly.

Whisk together the eggs, egg yolks, milk, orange juice, orange zest, and vanilla extract in a medium bowl until thoroughly combined.

Sift the cake flour, brown sugar, granulated sugar, baking powder, and salt in a large mixing bowl. Create a well in the center and pour in the wet ingredients.

Slowly fold the melted butter into the batter until it’s smooth and lump-free. Pour the batter into the prepared Bundt pan and bake for 35 minutes or until a toothpick inserted in the center comes out clean.

While the cake bakes, prepare the syrup by combining water and sugar in a small saucepan. Bring it to a boil, stirring until the sugar dissolves. Remove from heat and stir in vodka, Grand Marnier, and Disaronno.

Once the cake is out of the oven, let it cool for 10 minutes before turning it onto a wire rack. Then, brush the warm syrup generously over the entire cake and let it soak in for maximum flavor.