Name: Yellow Birthday Cake with Fluffy Chocolate Ganache Frosting
Ingredients: 1½ cups (3 sticks/342g) unsalted butter (room temperature); 2 cups (400g) granulated sugar; 3 eggs; 3 egg yolks; 1 teaspoon vanilla extract; 3 cups (360g) cake flour; 1 teaspoon baking powder; ½ teaspoon baking soda; ½ teaspoon kosher salt; 1 cup (240g) nonfat buttermilk; 12 ounces (340g) semisweet chocolate (finely chopped); 1 cup (240g) heavy cream; 1 cup (2 sticks/228g) unsalted butter (room temperature); 1 cup (140g) confectioners' sugar; ¼ teaspoon kosher salt; ½ teaspoon vanilla extract