Rum Cake (From Scratch!)

Bahan-bahan (12 porsi)

• 2 1/2 cups cake flour (or see substitution below if you only have all-purpose flour)
• 1 1/4 teaspoons baking powder
• 1 teaspoon salt
• 1/4 teaspoon baking soda
• 1 3/4 cups sugar, divided (plus extra for sugar-ing the pan)
• 10 tablespoons unsalted butter, melted
• 1/2 cup buttermilk, room temperature
• 1/2 cup rum
• 3 tablespoons vegetable oil
• 1 tablespoon vanilla extract
• 6 large egg yolks, room temperature
• 3 large egg whites, room temperature
• 1/2 cup butter
• 1/4 cup water
• 1 cup white sugar
• 1/4 cup rum